fallback
n. 应急计划,应变计划;减少,削减;储备物,备用物;退路;可依靠之物
adj. 退守的;应变的
例句
We need a fallback position if they won't do the job.
如果他们不干这个工作,我们就需要一个应变的方案。
《牛津词典》
What's our fallback if they don't come up with the money?
要是他们拿不出钱,我们如何应变?
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。
《柯林斯英汉双解大词典》