Back teeth
[医] 后牙, 磨牙
🧩 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;
teeth
[ti:θ]
n. 牙( tooth的名词复数 );齿;齿状部份;致力于（ 有难度的事）;tooth的复数形式;（组织、法律等）强大有效;不顾危险（或反对等）;
🗣️ 情景例句
For example, did you know that 1 in 4 teenagers has tried marijuana?
比如，你是否知道4个青少年中就有1位曾经吸过大麻？
Fine clothes make the man.
人要衣装。
Sally was very excited because she had never travelled on a train before.
萨莉非常激动，因为她从未乘过火车。