For instance, if a homing pigeon is to navigate with its Sun compass, its clock must be properly set by cues provided by the daylight/darkness cycle.

例如，如果一只信鸽要用它的太阳罗盘进行导航，它必须根据日光/黑暗的循环所提供的线索正确设置时间。

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I set out in darkness on Huntington Beach in California to run across America, one of a handful of competitors in the LA to NY Footrace 2011.

我在加利福尼亚州亨廷顿海滩摸黑出发跑步穿越美国，我是2011年洛杉矶到纽约竞走大赛为数不多的竞争者之一。

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Thus he avoided the quadruple trap which was set for him in the darkness by the four labyrinths which we have just enumerated.

他判断得很正确。 他就这样避开了黑暗向他伸出的、我们已列举过的四个迷宫给他设下的四个陷阱。

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Sharapova had begun her match against the American qualifier on Thursday night and won the first set before darkness stopped play.

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As darkness fell, studio lights were set up so that the rescue work could continue.

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He will play either Jo-Wilfried Tsonga or Stanislas Wawrinka in the quarterfinals (their match was suspended for darkness Sunday evening in the fifth set).

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