- [uncountable, countable]
the act or process of removing or obtaining something from something else 提取；提炼；拔出；开采 oil/mineral/coal, etc. extraction 石油、矿物、煤等的开采 the extraction of salt from the sea 从海水中提取盐 Commercial peat extraction is destroying many threatened habitats. 商业泥炭开采正在摧毁许多受威胁的栖息地。 Methods of extraction vary from mine to mine. 开采方法因矿而异。
- [uncountable] of… extraction (formal)
having a particular family origin （有…）血统；族裔 an American of Hungarian extraction 匈牙利血统的美国人 a young American lawyer of Irish extraction 一位有爱尔兰血统的年轻美国律师
- [countable] (specialist)
the process of removing a tooth 拔牙 I didn’t like having my teeth drilled but extractions were infinitely worse. 我不喜欢让我的牙齿被钻孔，但是拔牙却糟糕得多。
Word Originlate Middle English: via Old French from late Latin extractio(n-), from Latin extrahere ‘draw out’, from ex- ‘out’ + trahere ‘draw’.