"night and day" in Chinese (Simplified)
日日夜夜
Definition
用來形容某事一直發生，從不間斷，或表示兩者之間的巨大差異。可以表示「無時無刻」或「完全不同」的意思。
Usage Notes (Chinese (Simplified))
常用來強調某人非常努力，例如「夜以繼日地工作」表示不停歇。比較時說「差別如夜與日」表示完全不同。屬於口語表達，在正式寫作不常用。需依語境判斷是指連續活動還是巨大差異。
Examples
He studies night and day to pass the exam.
他为了通过考试**日日夜夜**地学习。
The workers repaired the road night and day.
工人们**日日夜夜**地修路。
She cared for her baby night and day.
她**日日夜夜**地照顾宝宝。
After the renovation, the house looks night and day compared to before.
装修后，这房子和以前**判若夜昼**。
Our lives changed night and day after moving to the city.
搬到城市后，我们的生活发生了**天翻地覆的变化**。
The difference between the old and new phones is night and day.
新旧手机之间的区别**天差地别**。