Postorder
[计] 后根次序
🗣️ 情景例句
I was in the neighborhood, so I thought I'd stop by.
我就住在附近，所以我想拜访一下。
There are always two sides to everything.
每件是都有两面性。
For years he has been asking me to collect snails from my garden and take them to him.
多年来，他一直让我把我园子里的蜗牛收集起来给他捎去。