A back number
过期的刊物, 过时的人
🧩 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;
🗣️ 情景例句
You were four or five years old, I think.
当时你才四、五岁 我想。
The world is a ladder for some to go up and others to go down.
世界好似一把梯，有人上去有人下。
The pie committee decided that the best way to transport the dish would be by canal,
馅饼委员会确认运输这只盘子的最佳方案是通过运河水运。