意思是日以继夜day and night用法：含义为日日夜夜,夜以继日，本短语通常用在一般时态,比如一般现在时、一般过去时或者一般将来时。

扩展资料举例：

1、He always works day and night.2、In order to buy his own house, Tom worked day and night。

意思：白天和夜晚， 日日夜夜同义词：night and day