| 单词 | bitumens |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔asphalt〕A brownish-black solid or semisolid mixture of bitumens obtained from native deposits or as a petroleum byproduct, used in paving, roofing, and waterproofing.沥青，柏油：一种黑褐色固体或半固体沥青混合物，采自天然矿藏或是石油的副产品，用于铺路，封屋顶和防水美国传统〔pitch〕Any of various natural bitumens, such as mineral pitch or asphalt.树脂，自然沥青：某种自然的沥青，如矿石沥青或树脂美国传统 |
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