It's no good sighing about your failure, it is better to start again.

为失败叹息毫无益处,最好是从头做起。

Sighing for sorrow can be harmful.

悲哀叹息会伤害身体。

She sighed over her unhappy fate.

她悲叹自己的不幸的命运。

I hope you are not still sighing over that boy.

我希望你不再为那个小伙子伤心叹息。

The teacher told him not to sigh over the failure of yesterday's test.

老师告诉他不要为昨天考试不及格叹息。