名词
中文翻译：粗质的石油酸
同义词：
['crude oil acid', 'crude oil acidity']
例句：
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1.The crude oil is extracted from the ground and refined into various products.
原油从地下提取出来，经过提炼制成各种产品。
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2. Crude oil is a source of energy that can be used to generate electricity.
原油是一种能源来源，可以用来发电。
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3. The crude oil contains many impurities that need to be removed before it can be used as fuel.
原油中含有许多杂质，需要去除才能作为燃料使用。