knock someone off their perch

(informal)cause someone to lose a position of superiority or pre-eminence

(非正式)使（某人）失去優(yōu)勢(shì)地位；殺（某人）的威風(fēng)

will this knock London off its perch as Europe's leading financial centre?.

這會(huì)使倫敦失去其歐洲主要金融中心的地位嗎？。