临阵磨枪

Explanation: Going into battle to fight when it is sharpening Caqiang. Metaphor at the last minute rush to prepare before. 　　Usage: -Linked; as the predicate attribute; negative, suggesting an analogy for the last minute rush before 　　Source: Qing Cao Xueqin's "Dream of Red Mansions" at 70 back: "'crash course' is also useless! Have children this will worry every day, write every thought, how many can not finish?" 　　Examples: Efforts to learn to rely on usual, not ~, just before the exam hard. Thesaurus:  unaware? unprepared, to dig a well when thirsty, repair a leak in mid-stream, Regret of the Mo and, before battle begins hone, Patients to call heaven, not dig a well until one thirsty— — not make timely preparations Antonym Group:  peradventure, for caution's sake, throw one's weight about, prepared for any eventuality, in case (of) contingency, casualness, (of parents) to bring up cihldren for the purpose of being looked after in old age, The idea that day, used for one day, Support troops for a thousand days in the moment, Device 2 is not deficient, because of the possibility of sth happening, be ever prepared, Store is no sore., count on one's cards, make providence, be precautious beforehand, nip (crush,check) the matter in the bud, like a dog threatening other people on the strength of its master’ s power, Rainy day, economise, nip in blossom, prevent