箭在弦上语出《太平御览》卷五九七引北齐魏收《魏书》：“陈琳作檄草成。呈太祖（曹操）。[查看详情]

千钧一发千钧之物吊在一根发丝上。比喻极其危急。例假手鞑靼连岁屏除岌岌之势千钧一发矣。——宋程珌《丙子轮对剳子》英imminent peril;[查看详情]

间不容发中间放置不下一根头发形容相距极微。例律厤迭相治其间不容发。——《大戴礼记》英a seamless heavenly robe——flawless; by the skin of one's teeth; by a hair's breadth; the difference is as narrow as a hair's breadth;比喻情势危急到极点。例其出不出间不容[查看详情]

触机便发机：弓弩上的发箭器。原指弓弩上的发箭器一经触发，箭便射出。后亦指人遇到机会便要发作。[查看详情]

箭拔弩张犹言剑拔弩张。比喻形势紧张一触即发。[查看详情]

剑拔弩张表現出彼此的敌意或敌对的行动；准备交手。例在双方争吵最激烈而均在剑拔弩张的时候。英at swords’points; be at to daggers drawn; be at daggers' points; be in a blustering and aggressive manner;比喻形势紧张一触即发。英with swords drawn and bows bent;[查看详情]