英语词汇“protobitumen”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	protobitumen
释义	protobitumen protobitumen [¦prōd·ō·bə′tü·mən] (materials) Any of the fats, oils, waxes, or resins which are present as unaltered or nearly unaltered plant and animal products from which fossil bitumens are formed.
随便看	bc-s bcs bcs1 bcs3 bcs70 bcsa bcsaa bcsac bcsaf bcsaj bcsap bcsar bcsara bcsb bcsba bcsbc bcsbi bcsc bcsca bcscc bcscca bcscd bcscf bcscm bcsco

英语词典包含2567994条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。