They can operate on a single document or a selection of them.

它们可以操作单个文档或者一组文档。

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Melaleuca stone rockery manufacturing is a good selection of them.

假山制造即是其间一个比较好的挑选。

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How do you like the gold earrings? We've got a wide selection of them.

您觉得金耳环怎么样？我们这儿有很多款可供选择。

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That is, if they exist through Darwinian natural selection, ? to what extent can we ever get rid of them?

如果性别差异存在于,达尔文所说的自然选择当中，我们可以消除性别差异吗？

耶鲁公开课 - 心理学导论课程节选

"We want to have a rich selection of content on them to interest consumers, otherwise they're just doorstops, " he says.

FORBES: Magazine Article

It 'chooses' a selection of pictures, by scoring paintings based on a selection of keywords associated with them.

BBC: NEWS | Technology | Smart search lets art fans browse

"Years of natural selection makes them better, " says Schreiber.

FORBES: Genius For Hire