🗣️ 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' 。
One has lived too near a wood to be frightened by owls.
深知底蕴，不以为怪。
The order will be mailed to you next week.
下星期就寄给你们。