also fall-back, as a noun, "a reserve," 1851, from verbal phrase, from fall (v.) + back (adv.), which is attested in the sense of "retreat" from c. 1600. As an adjective, from 1767 as a type of chair; 1930 as "that may be used in an emergency."
权威例句
1. Yesterday'svote itself was a retreat from an earlier fallback position.
昨天的投票本身就是放弃先前所留退路的做法。
2. 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?
3. Our fallback position was thus in print before our negotiations had ever begun.
我们的谈判还没有开始,我们的底牌就见诸文字了.
4. Your perception that all women have fallback guys isn't true.
你这种所有的女人都有“备胎”的看法是不正确的.
5. Do we need it now that we have fallback group here?