Postorder traversal
[計] 后序遍歷
?? 詞語組成解析
[計] 后根次序
[計] 遍歷
??? 情景例句
Now, let me explain one point to you.
現在，讓我就這一點進行說明。
Slow as molasses.
慢吞吞的！
By bicycle? From Beijing? That's a long trip.
騎自行車去？從北京出發？這可是長途旅行呀。