词汇“protobitumen”的意思、用法、释义、翻译、读音、例句、短语、词组-国际大辞典

单词	protobitumen
释义	protobitumenprotobitumenn.1.■原沥青(有机物转化为石油的最初阶段) 特殊用法labile protobitumen1.■易分解的原沥青
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国际大辞典收录了835600条英语、德语、日语等多语种在线翻译词条，基本涵盖了全部常用单词及词组的翻译及用法，是外语学习的有利工具。