These are all words for a line that marks the edge of sth and separates it from other areas or things. 以上各词均指边界、分界线。

• border the line that separates two countries or areas; the land near this line 指国界、边界、边疆、边界地区：◆a national park on the border between Kenya and Tanzania 位于肯尼亚和坦桑尼亚边界的国家公园
• boundary a line that marks the edges of an area of land and separates it from other areas 指边界、界限、分界线：◆The fence marked the boundary between my property and hers. 那道篱笆曾是我和她的房产之间的地界。
• frontier (BrE) the line that separates two countries or areas; the land near this line 指国界、边界、边疆、边境：◆The river formed the frontier between the land of the Saxons and that of the Danes. 这条河曾是撒克逊人与古斯堪的纳维亚人土地的分界线。

which word? 词语辨析

The point where you cross from one country to another is usually called the border. In British English it can also be called the frontier, but this is often in a context of wildness, danger and uncertainty. 国界线通常叫 border；英式英语亦可叫 frontier，但 frontier 常与荒芜、危险和不确定联系在一起：◆The rebels control the frontier and the surrounding area. 叛乱分子控制了边疆地区。The line on a map that shows the border of a country can be called the boundary but 'boundary' is not used when you cross from one country to another. 地图上标示的国界线可叫 boundary，但穿越国界不用 boundary：◆After the war the national boundaries were redrawn. 战后重新划定了国界。◆Thousands of immigrants cross the boundary every day. Boundary can also be a physical line between two places, for example between property belonging to two different people, marked by a fence or wall. * boundary 亦可指两地间的分界线，如用篱笆或墙隔开的分属于不同的两个人的土地分界线：◆the boundary fence/wall between the properties 分隔两所房子的篱笆/墙

Patterns

• across/along/on/over a/the border/boundary/frontier
• at the boundary/frontier
• the border/boundary/frontier with a place
• the northern/southern/eastern/western border/boundary/frontier
• a national/common/disputed border/boundary/frontier

Trade 贸易

• facilitate/regulate trade (with other countries) 促进/规范（与其他国家的）贸易
• form/join a trading bloc 建立/加入贸易同盟
• live in/compete in a global/the world economy 生存于全球/世界经济中；参与全球/世界经济竞争
• support/promote free trade 支持/促进自由贸易
• adopt/call for/oppose protectionist measures 采取/呼吁/反对保护主义措施
• erect/impose/reduce/remove trade barriers 设置/推行/减少/消除贸易壁垒
• impose/lift/raise/eliminate import tariffs (on sth) 征收/取消/提高/废除（某物的）进口关税
• have/run a huge/large/growing trade surplus/deficit 有巨额/持续增长的贸易顺差/逆差
• embrace/resist/drive globalization 接受/抵制/推进全球化

Politics and law 政治与法律

• conduct/handle/talk about/discuss foreign policy 执行/掌控/谈论/讨论外交政策
• pursue an aggressive/a hawkish foreign policy 执行强硬的外交政策
• require/use/conduct diplomacy 需要/使用/实施外交手段
• establish/break off/sever/restore diplomatic relations 建立/中断/断绝/恢复外交关系
• foster/promote/strengthen regional cooperation 促进地区间合作
• facilitate/achieve economic/political integration 促进/实现经济/政治一体化
• exercise/defend/protect/transfer/restore/regain national/state/full/limited sovereignty 行使/维护/保护/移交/恢复/重获民族/国家/全部/部分主权
• consolidate/extend/lose/retain your power (in the region) 巩固/扩张/丧失/保持（区域内的）势力
• hold/maintain/change/alter/shift/be a shift in the balance of power (in the region) 维持/改变（区域内的）势力均衡
• cause/create/open/expose/heal/repair a deep/growing/major/serious rift between X and Y 导致/造成/引发/暴露出/弥合/修复 X 与 Y 之间深层次的/不断扩大的/主要的/严重的分歧

Meetings and agreements 会议与协议

• have/hold/host/attend an international conference/an economic forum/a G20 summit 召开/举行/主办/出席国际会议/经济论坛/二十国集团峰会
• launch a new round of global/multilateral/world trade negotiations 发起新一轮的全球/多边/世界贸易谈判
• send/head/lead/meet a high-level/an official/a trade delegation 派遣/领导/带领/会见高层/官方/贸易代表团
• begin/start/continue/resume peace talks 开始/继续/重启和平谈判
• be committed to/be opposed to/disrupt/undermine/derail/sabotage the peace process 致力于/反对/扰乱/损害/干扰/破坏和平进程
• negotiate/achieve a lasting political settlement 达成/取得长期的政治协议
• broker/sign a peace deal/agreement/treaty 协商/签署和平协议

Conflict 冲突

• be/constitute/pose a threat to global security 构成对全球安全的一大威胁
• compromise/endanger/protect national security 损害/危及/保护国家安全
• justify/be in favour of/ (especially US) be in favor of/be against military intervention 证明军事干预合理；支持/反对军事干预
• threaten/authorize/launch/take/support/oppose unilateral/pre-emptive military action 扬言采取/授权使用/发起/采取/支持/反对单边的/先发制人的军事行动
• impose/enforce/lift/end economic sanctions/an arms embargo/a naval blockade 强制实行/解除经济制裁/武器禁运/海上封锁
• close/protect/secure/patrol the border 封锁/保卫边境；在边境地区巡逻
• lead/be involved in a peacekeeping operation 领导/参与维和行动

Aid 援助

• negotiate/announce a $15 billion aid package/an economic stimulus package 达成/宣布 150 亿美元的一套援助计划/刺激经济的一揽子计划
• send/provide/request/cut off military aid 派遣/提供/请求/中断军事援助
• bring/provide emergency/humanitarian relief 带来/提供紧急/人道主义救助
• deliver/distribute medical supplies/ (BrE) food parcels 运送/分发医疗用品/食品包
• fund/run a foreign/a local/an international NGO 资助/管理外国/当地/国际非政府组织
• reduce/eradicate child/global/world poverty 减少/根除儿童/全球性/世界性贫困