1 sentence

1. 为了在截止日期前完成任务，他夜以继日地工作。

   wèi​le zài jié​zhǐ rì​qī qián wán​chéng rèn​wu, tā yè​yǐ​jì​rì de gōng​zuò.

   He worked day and night to finish the task before the deadline.

   Source: Dong Chinese Dictionary