相關(guān)單詞近義詞 fallback 撤退, reserve 保留, replacement 更換, resource 資源, stand-in 替身, backup 后備, substitute 代用品, spare 備用的, emergency 突發(fā)事件, unreserved 坦率的, last-minute 最后一刻的, late 遲的, understudy 充當(dāng)（某角色的）候補演員...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 stand-by