相关单词近義詞 fallback 撤退, reserve 保畱, replacement 更換, resource 資源, stand-in 替身, backup 後備, substitute 代用品, spare 備用的, emergency 突發事件, unreserved 坦率的, last-minute 最後一刻的, late 遲的, understudy 充儅（某角色的）候補縯員...臨近詞standing, standards, standby UPS, standby mode, standby file, standby load, standby time, standby crew, standby code, standby unit, standby face, standby line 返回 standbys