We can't see the sun at night.

我们在夜里看不到太阳。

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There is no reflected energy available from the sun at night.

没有反映能量可以从太阳在晚上。

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Both these devices worked well in sunny climates; but in northern Europe, the sun may be hidden by clouds for weeks at a time, while temperatures vary not only seasonally but from day to night.

这两种装置在阳光充足的气候条件下工作良好；但在北欧，太阳可能一次被云层遮挡数周，而温度不仅随着季节变化，而且还随着昼夜变化。

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The reason for a fuel cell system is that of course the Sun does not shine at night.

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The sidewalks of the town were gray in the early morning and at night, but the noon sun put a glaze on them, so that the cement burned and glittered like glass.

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The mountains shimmer blue when the sun hits the eucalyptus vapors from the trees, at night, the dense star patterns of the Southern Hemisphere sky also shimmer in the clearest skies, and crossing the path to your cottage at night, you may well encounter a wombat, wallaby or kangaroo the 4000 acres are filled with them.

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