相关单词近义词 fallback 撤退, reserve 保留, replacement 更换, resource 资源, stand-in 替身, backup 后备, substitute 代用品, spare 备用的, emergency 突发事件, unreserved 坦率的, last-minute 最后一刻的, late 迟的, understudy 充当（某角色的）候补演员...临近词standing, standards, standby UPS, standby mode, standby file, standby load, standby time, standby crew, standby code, standby unit, standby face, standby line相似词standard operating procedure, standard time, standard-bearer, standardize, standing, standing desk, standing joke, standing on your head idiom, 返回 standby