To spare no effort; to exert oneself to the utmost; to do one's level best.
为了完成这个重要的项目，团队成员们都竭尽心力，常常工作到深夜。
To complete this important project, the team members spared no effort, often working late into the night.
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To spare no effort; to exert oneself to the utmost; to do one's level best.
Frequency: