Postman problem
[计] 邮递员问题
🧩 词语组成解析
🗣️ 情景例句
I made a lunch date with him and his daughter weeks ago.
几星期前我约好和他以及他女儿共进午餐。
Pain past is pleasure.
过去的痛苦即是快乐。
I often go-swimming, sometimes in a lake near my home, and sometimes in the river.
我经常去游泳，有时在我家附近的湖里，有时在河里。