jump the gun

• vi. 发令枪未响起跑；过早行动

例句

用作不及物动词 (vi.)

1. He was disqualified from the race for jumping the gun.
   他由于赛跑时偷跑而痛失了参赛的资格。
2. He jump the gun and open the test before the teacher say to start.
   在老师说开始前，他行动过早，先翻开了试卷。
3. They jumped the gun by building the garage before permission had been given.
   他们未得许可就抢先盖了汽车房。

词汇搭配

• jump the gun 发令枪未响起跑...