Postorder
[计] 后根次序
🗣️ 情景例句
I know it's sudden, Robbie,
我知道这件事很突然， Robbie。
You might be able to sue the company for age discrimination.
你就可以去控告这家公司搞年龄岐视。
Since the sea covers the greater part of the earth's surface,
既然海洋覆盖着地球的大部分表面，