🗣️ 情景例句
If you don't know a person's last name, use 'ma'am' or 'sir'.
如果你不知道一人的姓， 你应称呼他为 'ma'am' 或 'sir' 。
It's scheduled to arrive at 11:50.
按照列车时刻表是11点50分到。
As a matter of fact, it is the other way around.
事实上，情况正好相反。