1 (wiktionary) 2 (zh.wikipedia) 3 (en.wikipedia) 4 (glosbe)

Compounds Expand your vocabulary by studying more complex words built by the 'core words'.

They worked hard day and night .	他们夜以继日地努力工作。
She is working night and day .	她夜以继日地工作。
He worked day and night so that he might become rich .	他夜以继日地工作，以便致富。