put one's back into sth.

例句：

1. 1.She put her back into the project,working tirelessly for weeks.
   她全力以赴地投入到这个项目中，连续几周都努力工作。
2. 2. The team put their backs intothe competition, giving their all to win.
   团队全力以赴地参加比赛，尽其所能以求获胜。
3. 3. Heput his back into thework, never complaining despitethe long hours.
   他全力以赴地工作，尽管长时间工作从不抱怨。