jump the gun
英
美
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用作不及物动词 (vi.)
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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。
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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。
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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。
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