For better effect, nano mask is suggested to be used at night.

建议晚间使用可达到更好的疗效。

youdao

The utility model can be used at night without light. The utility model has entertainment performance and ornamental performance.

本实用新型可以在夜间无光时使用，并具有娱乐和观赏性。

youdao

Grid-scale batteries would boost efficiency by allowing solar energy to be used at night, for example, or excess power from a nuclear plant to be stored for later.

电网级电池将大大提高能效，比如允许存贮太阳能用于在夜间，或者存储一个核电厂在夜间发出过多的电，以供白天使用。

youdao

Charged up during the day, the accessories can then be used at night as decorative light in the home.

CNN: You wear IT well

They can be used at night or outdoors in full daylight.

ENGADGET: Vuzix designs Smart Glasses to look like sunshades, tout connected transparent display

Travel would be provided by a streamlined and refurbished underground system, which would also be used at night for transporting freight and goods into central London.

ECONOMIST: Cars