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🧩 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
Have you ever studied French?
你学过法语吗？
I'd like to have you come to my house for dinner sometime.
改天请到我家来吃饭。
There she studied the teaching of deafblind children.
在那里，她学习聋盲儿童的教学工作。