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封底；表后背
🧩 词语组成解析
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[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
You were wonderful, Harry!
你真是了不起， Harry
Where were you during the month of April last year?
去年四月份你在哪里？
Again the bees flew right to the dish.
蜜蜂又一次径直向碟子飞去。