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
I hear the exams will be very tough.
我听说考试挺难的。
What time do you get up every day?
你每天什么时间起床？
The use of gloves was not introduced until 1860, when the Marquis of Queensberry drew up the first set of rules.
1860年昆斯伯里侯爵第一次为拳击比赛制定了规则，拳击比赛这才用上了手套。