英语词汇“protobitumen”的中英文释义、用法、翻译及短语词组-英汉翻译词典

单词	protobitumen
释义	protobitumen 英?[pr??t??b?t'j?m?n] 美?[pro?to?b?t'j?m?n] 释义原沥青（有机物转化为石油的最初阶段）
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英汉翻译词典包含4367426条英汉汉英翻译词条，基本涵盖了全部常用英语单词及常用语的翻译及用法，是英语学习的有利工具。