Where population is growing fastest, in sub-SaharanAfrica, emissions per person are only a few percent of what they are in theU.S.—so population control would have little effect on climate.

在撒哈拉沙漠以南非洲人口增长最快的地方，人均排放只是美国人均排放的百分之几——因此控制人口对气候没有多大影响。

youdao

The friend's picture would serve as a control, to adjust for any effect that attractiveness might have on the subject's reaction to the person.

朋友的照片是用来控制并调整那种吸引力对测试者反映的效果的。

youdao

They invented laws to control how much a person could lift on the Sabbath, and how much he could eat and drink.

他们自己创造律法，控制一个人在安息日可以拿多少东西，以及可以吃喝多少。

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Keeping a person on a short leash means keeping him or her under close control.

VOA: special.2009.03.29

Every single person on a control order is British.

BBC: An armed officer

Valerenic acid, an ingredient of the root, acts on chemical pathways in the brain that control a person's level of anxiety or relaxation, according to scientific literature.

WSJ: Can a Root Get to the Problem of Insomnia?

The researchers found that, as a whole, the WoW group saw a greater increase in cognitive performance than the control group, though improvements tended to vary on a person-to-person basis.

FORBES: World of Warcraft May Protect the Aging Brain