petroleum refining process
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- 石油炼制过程
双语例句
- In fact, unsaturated hydrocarbons, which are not usually present in virgin petroleum, are nearly always manufactured as intermediates during the various refining sequences.
实际上，原油中一般不存在非饱和烃，几乎所有的非饱和烃都是在各种炼制过程中作为中间产品而产生的。
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