1
chlorofluorocarbons + plural verb
泛指这一类化学物质时，通常用复数形式 chlorofluorocarbons；作主语时，谓语动词用复数。
Chlorofluorocarbons damage the ozone layer.
含氯氟烃会破坏臭氧层。
含氯氟烃；氯氟碳化合物
chlorofluorocarbons — plural of chlorofluorocarbon
先理解核心含义，再看它在真实句子里的用法。
含氯氟烃；氯氟碳化合物
a type of fluorocarbon that contains chlorine, formerly used as a refrigerant and as a propellant in aerosol cans
Chlorofluorocarbons damage the ozone layer.
含氯氟烃会破坏臭氧层。
一类有机化合物,其中烃的氢原子被氯和氟原子取代；曾用作制冷剂和气雾剂推进剂,因破坏臭氧层而停用。
Any of a class of organic compounds in which the hydrogen atoms of a hydrocarbon are replaced with those of chlorine and fluorine; formerly used as refrigerants and aerosol can propellants but withdrawn due to causing damage to the ozone layer.
Many old refrigerators still contain chlorofluorocarbons that damage the ozone layer.
许多旧冰箱仍然含有会破坏臭氧层的氯氟碳化合物。
The use of chlorofluorocarbons in spray cans was banned in many countries.
喷雾罐中使用氯氟碳化合物的做法在许多国家已被禁止。
Scientists measured the amount of chlorofluorocarbon released from the old air conditioner.
科学家们测量了那台旧空调释放出的氯氟碳化合物的量。
泛指这一类化学物质时，通常用复数形式 chlorofluorocarbons；作主语时，谓语动词用复数。
Chlorofluorocarbons damage the ozone layer.
含氯氟烃会破坏臭氧层。
表示某物的用途时，常用被动结构 be used as，意为“被用作”。
Chlorofluorocarbons were formerly used as propellants in aerosol cans.
含氯氟烃以前被用作气溶胶喷雾罐中的推进剂。
be + a chlorofluorocarbon 用于说明某物质属于含氯氟烃这一类；注意单数前的不定冠词 a。
This substance is a chlorofluorocarbon.
这种物质是一种含氯氟烃。
Not this
Chlorofluorocarbon was once widely used as a refrigerant.
Use this
Chlorofluorocarbons were once widely used as refrigerants.
chlorofluorocarbon 是可数名词，单数形式前需要冠词或限定词，不能裸用；用复数形式泛指这一类物质，动词也要相应改为 were。
Not this
Many scientists study the effect of chlorofluorocarbons to the ozone layer.
Use this
Many scientists study the effect of chlorofluorocarbons on the ozone layer.
汉语的“对……的影响”容易译成 effect to，但英语的固定搭配是 effect on something；把介词 to 改为 on 才符合英语搭配。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
含氯氟烃排放
Chlorofluorocarbon emissions damage the ozone layer.
含氯氟烃排放会破坏臭氧层。
含氯氟烃推进剂
The aerosol used chlorofluorocarbon propellants before they were banned.
这种气雾剂在被禁止前使用含氯氟烃推进剂。
含氯氟烃制冷剂
Old refrigerators relied on chlorofluorocarbon refrigerants.
旧冰箱使用含氯氟烃制冷剂。
含氯氟烃分子
One chlorofluorocarbon molecule can destroy thousands of ozone molecules.
一个含氯氟烃分子可以破坏数千个臭氧分子。
含氯氟烃禁令
The international chlorofluorocarbon ban has helped the ozone layer recover.
国际含氯氟烃禁令帮助臭氧层恢复。
Use chlorofluorocarbons naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记住CFC：C-氯、F-氟、C-碳，曾是制冷剂喷雾，破坏臭氧层，紫外线使氯原子释放。
语域：formal 常见场景：环保政策与公约、化学/工业技术资料、学术论文 该词属于正式、偏科技语体，通常出现在环保法规、化学文献或工业技术资料中；日常口语中更常用简称CFC。
以 -carbon 结尾的 carbon、hydrocarbon、fluorocarbon 在词尾拼写和读音 /kɑːbən/ 上相近，但它们的重音多在 -car- 上，而 chlorofluorocarbon 的重音在 -fluor- 上，因此不算严格押韵。注意 chloroform (/ˈklɔːrəfɔːm/) 虽以 chloro- 开头，但读音是 /ˈklɔːrə/，与目标词中的 /ˌklɔːrəʊ/ 不同；fluorine (/ˈflʊəriːn/) 和 fluorescence (/flʊəˈresəns/) 虽带 fluor- 拼写，读音也与目标词中的 /ˈflʊərəʊ/ 不同。
Dictionary facts from ECDICT, WIKTIONARY.