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The dark clouds in the sky meant that a storm was coming.

天空中的乌云预示暴风雨即将来临。

《牛津词典》

When the sky suddenly turns dark and the wind is strong, watch out! A dangerous storm might be coming.

当天色突然变黑且狂风大作的时候，要小心！一场危险的暴风雨可能要来了。

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In other cities and smaller towns, local people listen to band concerts and watch fireworks explode in a dark sky.

VOA: special.2009.07.05

Max Arthur Cohn's painting "Coal Tower" shows the dark form of a coal tower against a light sky.

VOA: special.2009.03.23

Video images of stars shine in a dark,night sky.

VOA: special.2010.06.11

"I certainly enjoy going to the desert and just seeing the sky from a dark location, " he said.

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The criteria for a dark sky site includes that the Milky Way is visible to the naked eye.

BBC: Stargazing live: Astronomers stage Isle of Man events

At its peak intensity this weekend, the shower is expected to generate about 16 meteors per hour in a dark sky, Cooke said.

MSN: Time for your weekend shower �� of meteors, that is