🧩 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;
tooth
[tu:θ]
n. 牙;齿;齿状部份;
vt. 给…装齿;
vi. 啮合;
🗣️ 情景例句
Is that all?
就这些吗？
How about Mary? How long has she lived there?
玛丽怎么样？她在那儿住多久了？
Men in shirt sleeves stood outside their houses and glared at us.
只穿着衬衣的男人们站在屋子外面凶狠地盯着我们，