Fdt
形式描述技术
🗣️ 情景例句
Like what?
什么？
The tour will take about an hour and a half. We ought to be back here by 3:00.
参观大概要一个半小时，3点钟以前回到这里。
I'll teach you if you like.
要是你愿意学，我来教你。