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

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	tax framing tax free tax-free tax free acquisition tax-free acquisition tax free acquisitions tax-free acquisitions tax free exchange tax-free exchange tax free exchanges tax-free exchanges tax free income tax-free income tax free incomes tax-free incomes tax free investment tax-free investment tax free investments tax-free investments tax free money market fund tax-free money market fund tax free money market funds tax-free money market funds tax free money mutual fund tax-free money mutual fund

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