英语词汇grade of oil是什么意思，grade of oil的用法、释义、翻译、读音、例句、短语词组-英汉汉英翻译词典

单词	grade of oil
释义	DEFINITIVE EXAMPLES 权威例句〔WORSE〕California oil is a heavier and inferior grade of oil, compared with other crude oils. 与其他地方的原油相比，加州石油更黏稠、等级低。朗文写作活用
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