Grammars provide some constraints here, of course; but the study of selection among syntactic options falls within the fields of semantics, pragmatics, and register.

当然，语法会带来一些限制；不过，对句法选项的选择的研究属于语义学、语用论和术语范畴。

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IBM offers a wide selection of instructor-ld and self-study courses.

IBM提供了广泛的选择，包括自学和培训班。

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As the authors state in their final sentence: “…further studies with large study populations, where the potential for misclassification of exposure and selection bias is minimized, are warranted.”

研究人员在报告中也表示：“我们正在准备更大规模、更进一步的调查研究，从而尽量避免错误归类的现象和选择上的偏误。”

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A year later,Darwin would complete his detailed study of evolution through natural selection.

VOA: special.2009.12.01

Second, by including the entire eligible Danish population, which is covered by a national tumor registry, the study avoids the problem of selection bias (that is, people who do not make it into your study for various reasons, including refusal).

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The states of the old Confederacy boast 10 of the top 12 places for locating new plants, according to a recent 2012 study by Site Selection magazine.

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The study included a selection of 35 influential newspapers, including the New York Times, Wall Street Journal, Washington Post, Los Angeles Times and USA Today, and excluded blogs and opinion columns.

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