🧩 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;
exercise
['ɛksɚsaɪz]
n. 练习;运动，训练;运用;典礼;
vi. 锻炼，训练，练习;
vt. 锻炼（身体某部位）;使焦虑，使忧虑;实行，发挥（作用）;运用;
ex出+erc力量+ise表名词，物品，状态 →练习，锻炼
🗣️ 情景例句
I've got to keep my nose to the grindstone to support my family.
我拼命工作养家。
Soon up, soon down.
升得高，落得快。
Mrs. Zhu, I called to tell you that the conference has been delayed until the 15th and 16th.
朱夫人，我来告诉你会议已经推迟到了15号至16号开。