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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
and we're trying to resolve that problem.
试图解决这类问题。
What was your name again?
请再说一次名字好吗？
Let me help you. Do it like this.
我来帮你，要这样做。