1
ethene is a/an [adjective] [noun]
Ethene is a flammable gaseous alkene.
乙烯是一种易燃的气态烯烃。
由乙烯衍生的任何烯烃
先理解核心含义，再看它在真实句子里的用法。
由乙烯衍生的任何烯烃
Any alkene derived from ethylene
Ethene is a flammable gaseous alkene.
乙烯是一种易燃的气态烯烃。
任何由乙烯衍生的烯烃。
Any alkene derived from ethylene
Ethene is used to produce polyethylene, a common plastic.
乙烯用于生产聚乙烯，一种常见的塑料。
The industrial process converts ethane into ethene through cracking.
工业过程通过裂化将乙烷转化为乙烯。
Ripening fruit naturally releases small amounts of ethene gas.
成熟的水果会自然释放少量乙烯气体。
Ethene is a flammable gaseous alkene.
乙烯是一种易燃的气态烯烃。
Ethene is used in the production of polyethylene.
乙烯用于生产聚乙烯。
Industries produce ethene from petroleum.
工业从石油中生产乙烯。
Not this
Ethene is a saturated hydrocarbon.
Use this
Ethane is a saturated hydrocarbon.
中文学习者常混淆ethene（乙烯）和ethane（乙烷），因为拼写相似，但ethene是烯烃（含双键），而ethane是烷烃（只含单键）。错误句中把ethene当作饱和烃，实际上ethene是不饱和的。
Not this
We need two ethenes for the reaction.
Use this
We need two molecules of ethene for the reaction.
Ethene作为化学物质通常不可数，复数形式ethenes错误。应使用不可数形式ethene，或明确说明分子数量。中文学习者可能受汉语中可数用法影响而误加复数。
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Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
Use ethene naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
不可数名词，通常不用复数形式。
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.