by night

基本解释

The enemy fled in disorder by night.
敌人趁黑夜狼狈溃逃。
《新英汉大辞典》
And she danced, and must dance, over fields and meadows, in rain and sunshine, by night and day; but at night it was the most fearful.
她跳起舞来，而且不得不跳到田野和草原上去，在雨里跳，在太阳里也跳，在夜里跳，在白天也跳。最可怕的是在夜里跳。
By night they roost in the gently flowing shallows of the Platte, shin-deep in cool water, or else on sandbars, giving them warning against any predator that might come splashing out.
在夜里，它们栖息在普拉特河缓缓流动的浅水处，呆在没腿的凉爽河水中或沙洲上，因为溅起的水花会警告它们，可能有捕食者来了。
xianguo.com

They ride around the park in their bus, visit several places and are back in their Las Vegas hotel by night.
By day I find no relief, nor repose by night.
我白天不能放松，晚上又不得安息。
耶鲁公开课 - 旧约导论课程节选
Then shalt thou have relief by day and rest by night."
那么你便可以白天放松，晚上安息了“
耶鲁公开课 - 旧约导论课程节选

The proposed site is here in Copacabana, fabled for its beach by day, sex by night.
NPR: Plans for Sex Museum Create an Uproar in Rio