DEW: Water droplets condensed from the air, usually at night, onto cool surfaces.

露水：从空气中凝结出的水滴，通常在夜间出现，凝结在冰冷物体表面。

youdao

You are also undergoing changes applied to your body when you are taken aboard ship, and in your home usually at night.

您也发生变化应用到你的身体，当你在船上采取，并在您的家通常在夜间。

youdao

Under combat conditions, such movements are normally conducted every few days. These moves take place in all types of weather, usually at night.

在战斗条件下，此类行动常常几天一次，且会在任何气候条件下实施，通常是在夜间。

youdao

Want to go to a movie? Prices are usually lower in the daytime than at night.

VOA: special.2009.05.21

Well, I usually start out the, I guess, night, at the sort of...

通常，我会在晚上去那个……

有趣的吃东西协会 - SpeakingMax英语口语达人

But tornadoes at night are usually impossible to see.

VOA: special.2010.05.11

The trip to Florida may take only about two hours, usually at night.

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He said they "started seeing each other" usually at night in the Cowley area where they would listen to music, smoke and drink.

BBC: Court sketch of defendants

But the meetings were in secret, usually at night.

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