强弩之末

强弩之末 [qiáng nǔ zhī mò]

1. ■ an arrow at the end of its flight -- a spent force; a strong force that has been exhausted; (a great) cry and little wool; on the decline; (be) the final kick of the crossbow spring; The arrow from a strong bow becomes weak after flying its assigned distance.; the furthest reach of a shot from a strong bow:

右翼的敌人已经是强弩之末， 不能再威胁我们的阵地了。 The enemy on the right flank is now like a spent arrow and no longer a threat to our position.