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methane + noun
methane 作定语修饰名词很常见，如 methane emissions、methane gas。
Methane emissions from livestock are a major concern.
来自牲畜的甲烷排放是一个主要问题。
甲烷
先理解核心含义，再看它在真实句子里的用法。
甲烷
the simplest aliphatic hydrocarbon, CH4, found in natural gas and a major greenhouse gas
Methane emissions from livestock are a major concern.
来自牲畜的甲烷排放是一个主要问题。
The simplest aliphatic hydrocarbon, CH4, being a constituent of natural gas, and one of the most abundant greenhouse gases.
Any of very many derivatives of methane.
Methane is the main component of natural gas, which is used for heating and cooking.
甲烷是天然气的主要成分，用于供暖和烹饪。
Farmers collect methane from animal waste to generate electricity.
农民从动物粪便中收集甲烷来发电。
The scientist measured the amount of methane released by the wetland.
科学家测量了湿地释放的甲烷量。
methane 作定语修饰名词很常见，如 methane emissions、methane gas。
Methane emissions from livestock are a major concern.
来自牲畜的甲烷排放是一个主要问题。
表示“释放甲烷”常用 release 或 emit，若强调“排放到大气中”可接 into the atmosphere。
Bacteria in wetlands release methane naturally.
湿地中的细菌自然释放甲烷。
methane 通常不可数，要表达“一个甲烷分子”用 a molecule of methane。
A molecule of methane has four hydrogen atoms.
一个甲烷分子有四个氢原子。
Not this
Methane are a greenhouse gas.
Use this
Methane is a greenhouse gas.
甲烷在英语中通常作不可数名词，谓语动词应用单数 is；不要受汉语名词没有单复数变化的影响而误用 are。
Not this
Methane is greenhouse gas.
Use this
Methane is a greenhouse gas.
greenhouse gas 是可数名词短语，单数前需要加冠词 a，表示“一种温室气体”；汉语没有冠词，容易漏掉。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
甲烷排放
Methane emissions from livestock contribute to global warming.
牲畜排放的甲烷加剧了全球变暖。
甲烷气体
The swamp releases methane gas as plants decompose.
沼泽在植物分解时会释放甲烷气体。
甲烷水合物
Scientists are studying methane hydrate found under the ocean floor.
科学家正在研究海底的甲烷水合物。
甲烷泄漏
The pipeline has methane leaks that need to be fixed.
这条管道有甲烷泄漏，需要修复。
甲烷产生
Cattle farming is a major source of methane production.
养牛业是甲烷产生的主要来源。
甲烷捕集
The landfill uses a system for methane capture to generate energy.
垃圾填埋场用甲烷捕获系统来发电。
Use methane naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记忆联想：meth- 像 methyl（甲基），-ane 是烷烃后缀，合起来就是最简单的 CH4 甲烷。
语域：neutral 常见场景：环境与能源话题、科学报道、化学教材 甲烷是标准科学用语，语气中性；多用于环境与能源相关的书面讨论和新闻报道，日常口语中较少单独出现。
通常不可数；复数形式 methanes 表示不同类型的甲烷
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.