Ethologists—specialists in animal behavior—are interested in evolution, so they define the term narrowly.

动物行为学专家对进化很感兴趣，所以他们对这个术语的定义很狭义。

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TIME:Your book focuses specifically on marriage patterns within the black "middle class" of educated professionals. Why focus your research so narrowly?

你的书主要关注黑人中受过良好教育的“中产阶级”的婚姻模式。为什么把研究对象范围缩这么窄？

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It does so both in narrowly targeted ways, such as advising the White House, and in scattershot ways, such as Posting its course materials on the Internet.

它不仅采用针对性很强的方法，如在白宫里登广告。还采用将其课程材料发布在网上的这种扩散性更广的方法。

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There is another reason, too, why Malaysia's capital controls deserve little credit for its economic performance: they were applied so narrowly and imposed so belatedly that they have had little effect.

ECONOMIST: Malaysia

Moreover, the Federal Election Commission (FEC) has defined independence so narrowly that it is almost meaningless.

ECONOMIST: Campaign finance

Expecting to get dramatic growth, or value, out of a system so narrowly focused is expecting the impossible.

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