1
crude oil
原油为不可数名词，作主语时谓语用单数。
Crude oil is a major export for many countries.
原油是许多国家的主要出口产品。
原油
crude oils — plural of crude oil
先理解核心含义，再看它在真实句子里的用法。
原油
Unrefined oil found underground, composed mainly of hydrocarbons.
Crude oil is a major export for many countries.
原油是许多国家的主要出口产品。
Prepare the learner guide for this word
可生成：语法 Grammar。只有点击后才会开始生成。
未提炼的石油；地下发现的,主要由碳氢化合物组成
Unrefined oil; as it is found underground, consisting mainly of hydrocarbons.
The country relies heavily on imported crude oil for its energy needs.
该国严重依赖进口原油来满足其能源需求。
Crude oil prices have fluctuated wildly this year due to geopolitical tensions.
由于地缘政治紧张，今年原油价格波动剧烈。
They are building a new pipeline to transport crude oil from the oil fields to the refinery.
他们正在修建一条新管道，将原油从油田输送到炼油厂。
原油为不可数名词，作主语时谓语用单数。
Crude oil is a major export for many countries.
原油是许多国家的主要出口产品。
也可用 crude oil prices 表示。
The price of crude oil has risen sharply.
原油价格大幅上涨。
常用动词包括 extract, produce, refine 等。
Companies extract crude oil from underground reservoirs.
公司从地下油藏中提取原油。
Not this
The cost of a crude oil has increased.
Use this
The cost of crude oil has increased.
原油是不可数名词，不能与不定冠词 'a' 连用。
Not this
The raw oil is stored in these tanks.
Use this
The crude oil is stored in these tanks.
中文'原油'应译为 'crude oil'，'raw oil' 不是标准表达。
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Use crude oils naturally, then get feedback on meaning, tone, grammar, and phrasing.
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Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
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 DICTIONARY_API_DEV, ECDICT, WIKTIONARY.