成语名称：临阵磨枪：start to prepare at the last moment（grind the spear just before battle）英语： start to prepare at the last moment...
成语名称：临阵磨刀：start to prepare only at the last moment英语： start to prepare only at the last moment成语近义： 措手不及(cuò shǒu bù jí)...
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