fallback recovery低效恢复运行;撤退校正
fallback action回退动作;后援动作
Fallback Strategy回退策略
Fallback click后备点击
broad fallback幅度回落
fallback support包括值转换后备支持
team fallback全队撤退
fallback strategies应急策略
double fallback双故障低效率运行
ADJ（形容词） Someone's fallback position is what they will do if their plans do not succeed, or if something unexpected happens. 退守的; 应变的 [journalism] [ADJ n]
Yesterday's vote itself was a retreat from an earlier fallback position.
昨天的投票本身就是从早先的预备立场上的退却。