Even on a gray day, up to 80 percent of the sun's rays can pass through clouds, mist, and fog.

甚至当天看起来灰蒙蒙的时候，还是有80%的太阳光可以透过云层、薄雾和浓雾照下来。

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Because the smile will let you gray day become clear suddenly, the sunlight is bright and beautiful!

因为微笑会让你灰暗的一天豁然开朗、阳光明媚！

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But today it rained, the rain fine floating in the sky, gray day, you were carrying a small umbrella, small umbrella like dancing!

可是今天却下雨了，小雨细细的在天上飘着，天灰灰的，大家手里都拿着小伞，小伞像是在跳舞！

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The men knew it was the middle of the day because the color of the sea changed from slate gray to emerald green, with gold lights.

VOA: special.2011.04.09

On this gray March day Coen Gilbert has already driven his Prius to Harrisburg and back to try to persuade Pennsylvania legislators to back a pro-B corp measure.

FORBES: Rebuilding America

She looked into the sky slowly lightening to its gray beginnings of the day.

NPR: E.L. Doctorow on Sherman and 'The March'

The sky was gray near the tops of the mountains, as gray as a dark day in winter.

NEWYORKER: Beginners