Back substitution
[计] 倒转代换
🧩 词语组成解析
back
[bæk]
n. 背，背部;背面，反面;后面，后部;（椅子等的）靠背;
vt. 使后退;支持;加背书于;下赌注于;
vi. 后退;倒退;
adj. 背部的;后面的;以前的;拖欠的;
adv. 以前;向后地;
substitution
[ˌsʌbsti'tju:ʃən]
n. 代替;代用;替换;<化>取代（作用）;
🗣️ 情景例句
All you need is a little talent, and a lot of luck, and you too could become a celebrity.
你需要的就是一点点天才和多些运气，你也可能成为名人。
Did you go running this morning?
你今早去跑步了吗？
The one with the money got such a fright that he dropped the bag.
拿钱的那个小偷吓得把提包都扔了。