相关单词近义词 back down 放弃, bow out 退出, pull out 拔出, chicken out 因害怕而停止做某事..., back up (因积聚而)拥堵...临近词backfat, back, back reference, back and belly, back of beyond, back-bencher, back reflector, back mortaring, back-folding, backing vocals, back elevation, back-project 返回 back off