Oopm
面向对象程序设计方法学
🗣️ 情景例句
Does the hotel have a tour service?
这宾馆有旅游服务吗？
How long will I have to wait?
我要等候多久呢？
He suggested that a double railway-tunnel should be built.
他提议建一条双轨隧道，这样就解决了通风问题。