Ifthen
如果…那么
🗣️ 情景例句
An oil tanker ran aground and lost about 15,000 gallons of gas into the sea.
一般油轮搁浅，把 15000 加仑油倾泻在海里了。
Let's see you do it!
有本事你做给我看！
It was very dark, so they turned on a torch.
饭厅很暗，于是他们打开了手电筒。