词典释义：
[with obj.](常作
（用力）取出；拔出
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the fossils are extracted from the chalk .这些化石是从白垩中剥离出来的。
obtain (something such as money or an admission) from someone in the face of initial unwillingness
强行索取；设法得到（钱或入场券等）
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I won't let you go without trying to extract a promise from you .得不到你的承诺我是不会轻易放你走的。
obtain (a substance or resource) from something by a special method
提取；提炼；采掘（资源）
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lead was extracted from the copper .铅是从这些铜中提炼出来的。
select (a passage from a piece of writing, music, or film) for quotation, performance, or reproduction
抄录；摘录；选取
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the table is extracted from the report .这张表格是从报告中摘录下来的。
derive (an idea or the evidence for it) from a body of information
推断出，引申出，总结出
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there are few attempts to extract generalities about the nature of the disciplines .很少有人试图对这些学科本质的一般规律加以总结。
【数】 开（方），求（根）。
a short passage taken from a piece of writing, music, or film
摘录；选段；引文
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an extract from a historical film .一部历史影片中的一个选段。
[with modifier]a preparation containing the active ingredient of a substance in concentrated form
提取物；精，汁
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vanilla extract 香草精。
"late Middle English： from Latin
