| 单词 | coal seams | ||||
| 释义 | coal seams
例句释义: 煤层,号煤层 1. Coal is usually found associated with sandstones, carbonaceous siltites and coal seams. 通常找到煤炭伴生与砂岩、碳质的硅和煤层。 zhidao.baidu.com 2. The transmissivity of coal seams was found to be be one or two orders of magnitude greater than that of associated rock types. 煤层的透射率被发现是大于普通岩石一个或两个数量级。 zhidao.baidu.com 3. In practice, some effective promotion measures can be used to enhance gas extraction for low permeability coal seams. 实际中，对于低渗煤层，应采取有效的强化措施，以提高煤层气的回收率。 www.ceps.com.tw 4. The extinct trees of the genus Lepidodendron were once distributed widely and contributed largely to the coal seams of the Carboniferous . 已灭绝的鳞木属植物曾经分布广泛，它是石炭纪煤层的重要组成部分。 dictsearch.appspot.com 5. With the increase of the depth of coal seams mined, rock bursts will easily occur in gateways with fully-mechanized sublevel caving mining. 随着煤矿开采深度增加，综放开采回采巷道易发生冲击地压危害。 www.dictall.com 6. The author introduces an effective method to carry out correlation of coal seams by application of sulphur content in coal. 利用煤中硫分进行煤层对比是一种行之有效的辅助方法。 www.dictall.com 7. The deep coal bed is ignited with much water and high pressure in coal seams, and need to be moved in the channels. 深部煤层气化点火时是在煤层存在一定的水和压力下点火，同时还要能在通道内实现移动点火。 www.ceps.com.tw 8. Oilfields, natural-gas fields, aquifers filled with seawater and depleted coal seams are all possibilities. 油田、天然气田、蓄水层和废弃煤层都可以采用这种方法。 www.ecocn.org 9. Deep-hole presplitting explosion in coal seams with high gas content and low permeability was numerically simulated and analyzed. 针对高瓦斯低透气性煤层，对深孔预裂爆破进行了数值模拟分析研究。 www.ceps.com.tw 10. Major factors affecting gas content are buried depth of coal seams(pressure and temperature) and magma intrusion. 总体而言，煤层的埋深（压力和温度）以及岩浆的后期侵入是影响本区煤层气含量的主要因素。 www.chemyq.com 1. The largest shallow coal field in the world is in west China. The coal seams have thin roof and thick sandy overburden. 西部地区拥有储量最大的浅埋煤田，煤层顶板主要特点是基岩薄，地表为厚砂土层。 www.ceps.com.tw 2. Xuzhuang coal mine often encountered the hazard of water from Taiyuan Formation, as it mines the deep buried coal seams. 徐庄煤矿深部煤层的开采一直经受着太原组灰岩水的威胁。 www.dictall.com 3. The coal seams are thick and distributed widely and the coal bed methane reserving conditions are better in Yilan coal field. 依兰煤田煤层厚、煤层气储层分布广，储集条件较好。 www.chemyq.com 4. Coal mines in Donetsk, Ukraine are mainly composed of thin coal seams containing rich methane gas, thus difficult to exploit. 乌克兰顿涅茨克州的煤矿主要由薄煤层构成，尽管富含煤层气（甲烷气），但是，开采难度大。 bbs.e5zj.com 5. The method of gas drainage contains: self coal seam gas drainage, near coal seams gas drainage, and goaf gas drainage. 前言：瓦斯抽放的方法有本煤层抽放、邻近层抽放和采空区抽放。 www.chemyq.com 6. There are many coal seams, the wide coal seams distribution area and the better reserving condition in Jixi basin. 鸡西盆地煤层多、煤层气储层分布广，储集条件较好。 www.chemyq.com 7. Prewetting of coal seams by water infusion is an essential measure for dust control at working faces. 煤层注水预湿是采煤工作面防尘的治本措施，添加湿润剂是改善煤层注水效果的重要途径。 www.dictall.com 8. For decades the thick coal seams underneath it made Saarland a pawn in the power-games of Germany and France. 几十年来，萨尔州地下厚厚的煤层使得该州成为德国和法国权利游戏中的有利工具。 www.ecocn.org 9. This technique enables extraction of fuel from small, difficult-to-access coal seams, and could double the world's current coal reserves. 这项技术可以从窄而难以进入的煤层中提取燃煤，并可能使目前世界上的煤炭储量增加一倍。 www.bing.com 10. Generally transmissivity of coal seams was found to decrease with depth. 一般煤层的透射率随着深度减少而减少。 zhidao.baidu.com 1. The layers under coal seams in the study area generally containing fluvial sediments suggested that the coal developed in fluvial system. 不同层位的煤层，其下面普遍有河流相沉积，说明煤层是在古河流基础上发展起来的； www.chemyq.com 2. Based on Darcy's law, one kind of the equation for gas flow in coal seams has been corrected and reestablished in this paper. 本文在达西定律基础上，修正了一类煤层瓦斯流动方程。 www.chemyq.com 3. Coal seams, like oilfields, vary hugely in their geology. 而且就像油田一样，煤层在地底下变化也非常巨大。 www.ecocn.org 4. The first choice for precaution of pressure bump is water injection into coal seams. 煤层注水是世界上煤矿矿井防治冲击地压的首选措施。 www.ceps.com.tw 5. In order to forecast and prevent gas discharging quantity, it must grasp discharging rule of coal seams gas and gas discharging quantity. 为了有效地进行瓦斯涌出量的预测和防治，就需要掌握煤层瓦斯的解吸规律和可解吸瓦斯量。 epub.cnki.net 6. The mine has low gas and no danger of coal-dust explosion. The main coal seams that is designed has three layers. 井田内地质构造比较简单，主要为纵贯井田东西的天仓向斜，属于低瓦斯矿井，无煤尘爆炸危险； www.txjunshi.com 7. In order to predict the mining effect and choice the technical decision, the comprehensive evaluation on steep coal seams was taken. 为了预测急倾斜煤层开采的效果和决策辅助技术，对急倾斜煤层可采工艺性进行综合评价。 www.dictall.com 8. Based on the strata behaviors of steep coal seams, the forms of roof breakage and movement were studied. 根据大倾角煤层采场矿压显现特点，对采场顶板岩层的运动、破坏形式进行了研究。 www.dictall.com 9. Coal miners; coal seams; coal haulers. 煤矿工；煤层；运煤工。 www.hotdic.com 10. Coal seams intermixed with iron ore. 煤层和铁矿混杂在一起。 1. The thicker coal seams are located in a 10-15 km wide belt along which the channel meanders . 较厚的煤层位于河道发生弯曲的、宽10-15公里的地带内。 www.bing.com 2. Thin coal seams have two kinds of origin: one is sedimentary and another is tectonic, especially from faulting. 薄煤成因有两种：一种为沉积造成；一种是构造形成，特别是断层构造。 www.chemyq.com 3. Here the wealth of the land lies below the surface in rich coal seams, 在这里，土地的财富埋藏在地表下丰富的煤层中。 www.jukuu.com 4. A Caving Blast Test with a Detonating Fuse over the Tough Roof of a Group of Steep Coal Seams 急倾斜煤层群坚硬顶板导爆索爆破放顶试验 www.ilib.cn 5. Research and Application of the Technique of Upward Mining in and its applicoa Lonely Island Zone for Closed Coal Seams 近距离煤层孤岛区域上行开采技术研究与应用 service.ilib.cn 6. Study of Dynamic Control Technology over Surrounding Rocks in Main Roadways with the Underlying Coal Seams Mined 下部煤层跨采大巷围岩动态控制技术研究 service.ilib.cn 7. The characteristics of accompanying structure of the interlayer sliding among the coal seams and the influence to coal mine production 煤系层间滑动伴生构造特征及对煤矿生产的影响 www.ilib.cn 8. Selection and evaluation of the mining methods for the thick and extra-thick coal seams of the Carboniferous System in Datong mining area 大同煤田石炭系厚及特厚煤层采煤方法的选择与评价 www.ilib.cn 9. Mining Technology without Pillar in Raise Direction of Close and Overlapping Inclined Coal Seams 上山近距离压覆倾斜煤层无煤柱开采技术 www.ilib.cn 10. New Thinking About Exploitation of Coal Seams with High Gas Content and Main Problems to be Researched 高瓦斯煤层开采的新思路及待研究的主要问题 ilib.cn 1. Study of Geological and Technologic Evaluation for Steeply Inclined Coal Seams 急倾斜煤层可采工艺性评价及应用研究 service.ilib.cn 2. Geological History Model and Its Numerical Simulation of Coalbed Methane Emission for Multi-Coal Seams 煤层气多煤层扩散逸失地质历史模型及数值模拟 www.ilib.cn 3. Application of Direct Fire- suppression Technique with Temperature- resistant Highly Aqueous Gel in Spontaneous Fire Control of Coal Seams 耐温高水胶体直接灭火技术在煤层自燃火灾中的应用 www.ilib.cn 4. Prevention and Controlling of Spontaneous Combustion of Coal Seams by Combining Air- pressure - adjusting with Inhibitors 风压调节与阻化剂相结合防治煤层自然发火 scholar.ilib.cn 5. Experimental Research of the Application of Anthracitic Column Mining Technology in the Inclined Coal Seams 急倾斜煤层群应用无煤柱开采技术的试验研究 www.ilib.cn 6. Coal preparation plant; assessment of the liability to breakdown in water of materials associated with coal seams 选煤厂.煤层共生体材料在水中粉碎程度的评价 www.mapeng.net 7. Study of Forecast Model of Spontaneous Combustion in Goaf of Close Distance Coal Seams 近距离煤层采空区自然发火预测模型研究 service.ilib.cn 8. Practice of Outburst Prevention by Ring Pattern of Periphery Holes during Exposing Coal Seams in a Crosscut 石门揭煤应用周界外环状布孔法防突的实践 www.ilib.cn 9. Intrusive features and its influence of lamprophyre on coal seams and coal quality in Tongxin mine field 同忻井田煌斑岩侵入特征及对煤层和煤质的影响 www.ilib.cn 10. Test Research of Full-mechanized Caving Mining with Short Caving Height in Large Inclined Angle, Extremely Thick and Combustible Coal Seams 大倾角特厚易燃煤层群小放高综放开采试验研究 ilib.cn 1. Application of Research on Distributing Discipline of Abutment Pressure At Combined Mining Among Short Distance Coal Seams 滞后支承压力研究在近距离煤层联合开采中的应用 www.ilib.cn 2. Comprehensive cause division of spontaneous combustion types of coal seams in Wuda coalfield, Inner Mongolia 乌达矿区煤层自燃综合成因分类 www.ilib.cn 3. Determination of Pillar thickness While Exposing Outburst- prone Coal Seams In a Crosscut 突出危险煤层石门揭煤岩柱厚度确定 www.ilib.cn 4. Gas Control Techniques for Initial Mining Face of a Group of Coal Seams 煤层群首采工作面瓦斯治理技术 ilib.cn 5. Investigation and Application of Gas Pre- drainage Technique along Regional Bedding Strip in Coal Seams with Low Gas Permeability 区域顺层条带预抽瓦斯防突技术在低透气煤层中的考察应用 service.ilib.cn 6. Study into the movement characteristics of the rock layers covering the steep coal seams 大倾角煤层上覆岩层运动规律的实测研究 www.ilib.cn 7. Study and practice of bottom slicing relieving mining in condition of trouble coal seams with high ground stress under deep coal mine 深井高应力难采煤层上行卸压开采的研究与实践 www.ilib.cn 8. Discussion on prevention and administration of repetitive recovery self-combustion of thick coal seams 浅谈厚煤层复采自燃发火的防治 www.ilib.cn 9. Techniques and Practice of Raising Gas Drainage Effectiveness from Extra-thick Coal Seams with Loa Gas Permeability 提高低透性特厚煤层瓦斯抽放效果的技术和实践 ilib.cn 10. Comprehensive Gas Control Techniques for Protective Coal Seams with Fully Mechanized Mining 保护层综采工作面的瓦斯综合治理技术 ilib.cn 1. Tectonic Deformation and its Control over Thickness of Coal Seams in Haizi Coal Mine 海孜煤矿构造变形及其对煤厚变化的控制作用 www.ilib.cn 2. Parameter reverse-solving of infiltrating character during water injection into coal seams 煤层注水渗透特征的参数反演 www.ilib.cn 3. Simulating test on damage regularities of thick sandy soil layer and load distribution on key roof block in shallow coal seams 浅埋煤层厚沙土层顶板关键块动态载荷分布规律 service.ilib.cn 4. Synthetical Analysis on Adsorbing Characteristic Experiment of Coal Seams 煤储层的吸附特征实验综合分析 www.ilib.cn 5. Wall Rock Stability Classification of Gently Inclined Coal Seams Laneway and the Research of Rockbolt Shoring Design 缓倾斜煤层巷道围岩稳定性分类与锚杆支护设计决策系统研究 www.ilib.cn 6. Study on the rational staggered operation for mining simultaneously the two nearby coal seams 近距离煤层同采工作面合理错距研究 www.ilib.cn 7. Method of assessment of the liability to breakdown in water of materials associated with coal seams 与煤层相关的物质在水中易断裂的评估方法 www.mapeng.net 8. The relation between district raise in the multiple coal seams and its pillars 多煤层采区上山与煤柱之间的关系 www.ilib.cn 9. Probe into the Tunneling and Supporting Modes in the Coal Seams with Complicated Structures 结构复杂煤层中掘进与支护方式的探讨 www.ilib.cn 10. Gas Drainage from Flat-pitching Group of Coal Seams with Low Gas Permeability during Their Ascending Mining 缓倾斜低透性煤层群上行开采瓦斯抽放技术 ilib.cn 1. Findings and Significance of Algae and Bacteria in High-Sulfur Coal Seams in Wuda Coalfield, Inner Mongolia 乌达矿区高硫煤中菌藻类体的发现及意义 www.ilib.cn 2. Pilot study on directional drilling along coal seams was conducted with similar materials; 用相似材料模型试验研究了沿煤层定向钻进； www.chemyq.com 3. Experimental Study on the Feasibility of Compound Technique of Perforating in Coal Seams 复合射孔技术用于煤层致裂的可行性实验研究 www.ilib.cn 4. Resource Recovery and Management during Sublevel Caving Mining of Extra-thick Coal Seams 特厚煤层放顶煤开采的资源回收管理 www.ilib.cn 5. Physical modeling experiment of extraction of protective seam in dip-slopping coal seams 急倾斜煤层开采解放层相似模拟实验 scholar.ilib.cn 6. Application of Rock Horizontal Long Boreholes to Methane Drainage in Adjacent Coal Seams 采用岩石水平长钻孔抽放邻近层瓦斯 ilib.cn 7. New combined mining technology for steeply inclined short-interval thick coal seams 急倾斜近距离厚煤层联合开采新工艺 service.ilib.cn 8. Determination of Time Step and Space Interval in Numerical Simulation of Gas Flow in Coal seams 煤层瓦斯流动数值解算时空步长的选取 ilib.cn 9. Research on Complete Equipment of Fully-mechanized Mining and Caving Faces in Hard Thick Coal Seams 坚硬厚煤层综放工作面设备配套技术的研究 ilib.cn 10. Study on combined mining and exploration for the thin coal seams very close under gob water 极近距离老空水下薄煤层联合开采探测研究 service.ilib.cn 1. Superficial View on Origin of Thin Coal Seams in Lower Permian Tongziyan Formation, Sanming Prefecture, Fujian Province 福建省三明地区下二叠统童子岩组薄煤层成因浅析 www.ilib.cn 2. Design of Gas Release Boreholes for Exposing Coal Seams in a Crosscut 石门揭煤瓦斯卸压钻孔设计 www.ilib.cn 3. Parameter reverse-solving of the infiltrating character of coal seams injection based on Genetic Algorithms 基于遗传算法的煤层注水渗透特征参数反演 168.160.184.82:8080 4. Study of erosion zones in coal seams is Tiefa mining area 铁法矿区煤层冲刷带研究 www.ilib.cn 5. Research on Extraction and Emission Laws of Gas for Pressure-relief in Protecting Coal Seams 保护层卸压瓦斯抽采及涌出规律研究 scholar.ilib.cn 6. Simulative Experiment of Pneumatic Slagoff for Boreholes in Coal Seams 煤层钻孔风力排渣模拟实验研究 www.ilib.cn 7. Comprehensive Fire Control in Gates of Steep Extra-thick Inflammable Coal Seams 急倾斜特厚易自燃煤层顺槽综合防灭火 www.ilib.cn 8. Bolt and Truss Supporting Technology of Combined Roof in the Below Coal Roadway of Near Coal Seams 近距离煤层下层煤巷复合顶板锚杆与桁架支护技术 www.ilib.cn 9. A New Dismantling Way for Integrated Mining Work Face of Thin and Medium Coal Seams 薄及中厚煤层综采工作面拆除新方法 www.ilib.cn 10. Zoning Index of Rich Water-bearing Roof Strata and Water Inrush Forecasting in Coal Seams 煤层顶板岩层富水性分区指标及其涌水量预测 www.ilib.cn 1. A New Dismantling Way for Integrated Mining Work Face of Thin and Medium Coal Seams 薄及中厚煤层综采工作面拆除新方法 www.ilib.cn 2. Zoning Index of Rich Water-bearing Roof Strata and Water Inrush Forecasting in Coal Seams 煤层顶板岩层富水性分区指标及其涌水量预测 www.ilib.cn 3. The Experiences of Datong Coal Group Company in Mining the Coal Seams with large Tilt Angles 同煤集团大倾角煤层的开采经验 service.ilib.cn 4. Experimental Study on Supports of Seam Roadways in Deeply Inclined Coal Seams 急倾斜煤层煤巷支护试验研究 www.ilib.cn 5. Optimization of Dragline Operation Mold for Multiple Coal Seams 复合煤层条件下拉斗铲作业方式优化研究 www.ilib.cn 6. Research on Blast - winning Technology for Composite Coal Seams 复合煤层放炮落煤工艺的研究 www.ilib.cn 7. Substance Sources of Rare -Earth Elements in Late Permian Coal Seams on Coal Mines in Bijie 毕节煤矿区晚二叠世煤层稀土元素的物质来源 www.ilib.cn 8. The application of coal plough in inclinedslicing mining for the thick coal seams with greater angle 刨煤机在大倾角厚煤层倾斜分层开采工作面中的应用 ilib.cn 9. Influence of Second Mining of Coal Seams on Crosscut and Countermeasures 煤层复采对石门的影响及对策 www.ilib.cn 10. Model Test Study on Underground Coal Gasification in Inclined Coal Seams 倾斜煤层煤炭地下气化模型试验研究 service.ilib.cn 1. Model Test Study on Underground Coal Gasification in Inclined Coal Seams 倾斜煤层煤炭地下气化模型试验研究 service.ilib.cn 2. Reducing Operation Period of Exposing Coal Seams in a Crosscut by Non-uniform Hole Layout 非均匀布孔缩短石门揭煤工期 service.ilib.cn 3. Selecting Method of Digging Position which is in the Lower Coal Seam of Short Distance Coal Seams 近距离煤层下层煤巷道开掘位置选择 www.ilib.cn 4. Winning Technology in Unstable Occurrence Region of Coal Seams 煤层赋存不稳定区域采煤的回采工艺 www.ilib.cn 5. Evaluation on coal washability of different genetic coal seams 不同成因类型煤的可选性评价 ilib.cn 6. Prof. S. S. Gerchikov and his team developed the methods of steep gradient coal seams mining; 格希可夫教授和他小组开展陡坡煤层采矿的研究。 kyiv.363.net 7. Study on Improving Gas Drainage Volume of Coal Seams with Low Gas Permeability 提高低透气性煤层抽排瓦斯量的试验研究 ilib.cn 8. Numerical Simulation of Fluid-Solid Coupling Seepage in Coal Seams Gas 煤层瓦斯流固耦合渗流的二维数值模拟 168.160.184.78 9. Drilling technology of long hole using for discharging gas from coal seams 抽放瓦斯顺煤层长钻孔施工技术 ilib.cn 10. Ground pressure of top-coal caving face in difficult mining steep coal seams 急斜难采煤层水平分层放顶煤开采矿压研究 service.ilib.cn 1. Ground pressure of top-coal caving face in difficult mining steep coal seams 急斜难采煤层水平分层放顶煤开采矿压研究 service.ilib.cn 2. Metamorphic Rule of coal seams by Igneous Invasion in Juye Coalfield 巨野煤田岩浆岩侵入煤层变质规律研究 service.ilib.cn 3. Operate dragline cranes to expose coal seams and ore deposits at open pit mines 操作牵引式起重机使煤层，矿床暴露于地表。 blog.sina.com.cn 4. Determination of load on the support of goafside roadway located in bottom of thick coal seams with slicing method 厚煤层底分层沿空留巷支架载荷的确定 www.ilib.cn 5. Cause Analysis on Thickness Variation of Coal Seams in Tucheng Mine 土城矿煤层厚度变化成因分析 service.ilib.cn 6. Application of Sulphur Content in Coal to Correlation of Coal Seams 煤中硫分在煤层对比中的应用 service.ilib.cn 7. Practice of Exposing Outburst Coal Seams in Crosscut in Luling Mine 芦岭煤矿突出煤层石门揭煤的实践 www.ilib.cn 8. Structural Analysis for Roof Movement for Steep Coal Seams 大倾角煤层采场顶板运动结构分析 service.ilib.cn 9. Discrimination of Formative Factor of Thin Coal Seams 薄煤层的形成因素辨析 www.ilib.cn 10. Application of Safe and High-Efficient Exploitation System of Coal and Gas in Coal Seams 煤层群煤与瓦斯安全高效共采体系及应用 www.ilib.cn 1. Application of Safe and High-Efficient Exploitation System of Coal and Gas in Coal Seams 煤层群煤与瓦斯安全高效共采体系及应用 www.ilib.cn 2. Study on Gas Content and the Attenuation Characteristics of Coal Seams of Huainan Xinzhuangzi Mine 新庄孜矿煤体瓦斯含量与震波衰减特征分析 www.ilib.cn 3. Pilot Study on Directional Drilling along Coal Seams 沿煤层定向钻进的试验研究 service.ilib.cn 4. Analytic Method of Calculating Gas Content in Coal Seams in Deep Mining 煤矿深部开采煤层气含量计算的解析法 www.ilib.cn 5. Solid mineral fuels - Guidance on the sampling of coal seams 固体矿物燃料.煤层取样指南 www.mapeng.net 6. The Coal Seam System of Fissures and Their Influence on The Occurrence of Coal Seams 煤层裂隙系统及其对煤层气产出的影响 service.ilib.cn 7. Single longwall mining method in thin or middle thick coal seams 薄及中厚煤层单一长壁采煤方法 wenku.baidu.com 8. Selection of mining method for the thick coal seams 关于厚煤层开采工艺的选择 www.ilib.cn 9. Research on bolting support in "three soft" coal seams “三软”煤层煤巷锚杆支护的应用研究 service.ilib.cn 10. The gas-bearing properties of coal seams in Erdaoling mining area, Inner Mongolia 内蒙古二道岭矿区煤层含气性特征 www.ilib.cn 1. The gas-bearing properties of coal seams in Erdaoling mining area, Inner Mongolia 内蒙古二道岭矿区煤层含气性特征 www.ilib.cn 2. Diffusion Mechanism of Porous Gases in Coal Seams 孔隙气体在煤层中扩散的机理 www.ilib.cn 3. Measures to Improve Coal Quality in Mining of Low Coal Seams 薄煤层开采中提高煤质的措施 www.ilib.cn 4. A study on bolting in gateways in deeply inclined coal seams 急斜煤层煤巷锚梁网支护技术 www.ilib.cn 5. Effect of coalification rank on CO absorption by coal seams 煤的变质程度与煤层吸附CO影响的实验研究 ilib.com.cn 6. Brief Analysis on Looking for Fault-wring Coal Seams 浅析断失翼煤层的寻找 www.ilib.cn 7. Analysis on laws of water driving gas in water injection into coal seams 煤层注水水气驱替的理论分析 www.ilib.cn 8. The Study on the theory of water and gas replacing during water injection into coal seams 煤层注水的水气驱替理论研究 scholar.ilib.cn 9. The Simulation of Gas Flow in Coal Seams 煤层中瓦斯流动的计算机模拟 service.ilib.cn 10. Paying Attention to Some Questions about Gas Drainage Design for Short-distance Coal Seams Group 近距离煤层群瓦斯抽放设计应注意的几个问题 www.ilib.cn 1. Paying Attention to Some Questions about Gas Drainage Design for Short-distance Coal Seams Group 近距离煤层群瓦斯抽放设计应注意的几个问题 www.ilib.cn 2. Feasibility Analysis and Technology Measure of Up-mining in Near Coal Seams 近距离煤层上行开采可行性分析及技术措施 www.ilib.cn |
||||
| 随便看 |
|
英汉双解词典包含2704715条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。