on the back foot片語KK [ɑn ðə bæk fʊt] /ɑn ðə bæk fʊt/發音片語1處於守勢、居於劣勢、陷入被動英式The team spent the whole second half on the back foot.整個下半場,這支球隊都處於守勢。2使陷入被動、使措手不及與 put、catch 等連用Her sharp question put the minister on the back foot.她尖銳的提問讓部長一時陷入被動。