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Until now, scientists have made three kinds of drugs.

到目前为止，科学家已经研制出了三种药物。

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There are three kinds of life: the vegetal life, zooid life, and the rational life.

生命有三种，即植物性生命，动物性生命和理性生命。

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The Smithsonian Conservation Biology Institute studies and cares for thirty-three kinds of animals there.

VOA: special.2010.06.22

Last time we said we had three kinds of texture in music which are: monophonic, homophonic and polyphonic.

上一次我们说过,音乐中有三种织体,单音,主音和复音织体

耶鲁公开课 - 聆听音乐课程节选

If we're focused on the work of art in and of itself, on the poem, we obviously in thinking about what it means need to come to terms with three kinds of evidence."

将注意力放在艺术作品本身或者说诗本身上，很显然，如果我们想考虑它所表达的意思的话,我们必须对三种证据作出让步“

耶鲁公开课 - 文学理论导论课程节选

Three kinds of action have been proposed: market control, legal reform and tougher regulation.

ECONOMIST: The future of Fleet Street

His ideal number is three kinds of finger sandwiches and three to five types of desserts.

WSJ: Tricks of the Trade: The Modern Tea Party

Conway spent the next decade working on three kinds of silicone catheters for home and hospital use.

FORBES: Magazine Article