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词汇
coal tar
例句
Petroleum is a derivative of
coal tar
.
石油是煤焦油的衍生物。
Petroleum is derived from
coal tar
and used to make gasoline.
石油衍生自煤焦油,用来生产汽油。
If coal is heated in the absence of air,
coal tar
is produced.
在隔绝空气的状态下加热煤,便会产生煤焦油。
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更新时间:2025/5/2 20:56:59