At installation, insufficient compression of the sealing pad behind the carbon ring seal of the expander results in oil entrance to expander body and to the corresponding pipeline.

由于膨胀机碳环密封后面的密封垫片在安装时未被充分压紧，使膨胀机机体及相应管道进油。

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This paper reviews the catalyst system in RCM reaction and RCM application in the synthesis of natural products including carbon ring, oxygen heterocycles and nitrogen heterocycles, etc.

本文概述了关环转换反应所用催化剂体系及其在天然产物合成中的应用，内容涉及到碳环及含氧、含氮杂环天然产物的合成。

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Doctors Stevenson is analyzing one element—carbon-14 in ring from both living and dead trees.

史蒂文森博士正在分析一种元素——活树和死树年轮中的碳-14。

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Benzene is a ring that's made up of six carbon atoms and six hydrogen atoms.

苯环是一个由六个碳原子,和六个氢原子组成的环。

麻省理工公开课 - 化学原理课程节选

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