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Jurassic Biostratigraphic Sequence in the Middle of Northern Tibet.
辽西地区白垩纪火山岩层序探讨.
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Trilobites were rapidly evolving forms and are of widespread use in biostratigraphic studies.
三叶虫是进化迅速的种型,并广泛用在生物地层学的研究上.
英汉双解词典包含4367426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。