🧩 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
Would you describe yourself as outgoing or more reserved?
你认为你是个外向的人还是内向的人？
We would like to know how you will pack the silk shirts.
我们想知道你们如何包装这些真丝衬衫。
I found him seated on the bench.
我发现他在椅子上坐着