Relation back
[法] 追溯效力
🧩 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;
🗣️ 情景例句
There's still an outside chance that he'll make it into the finals.
他打入决赛还有一线希望。
What do you do besides eating?
除了吃，你还会做什么？
How much more?
还要多下多少？