Preorder traversal
[计] 前序遍历
🧩 词语组成解析
[计] 先根次序
[计] 遍历
🗣️ 情景例句
Don't worry about it.
别介意。
It is not work that kills, but worry.
劳动不伤人，忧虑才伤人。
He sees it edited by a definite set of customs and institutions and ways of thinking.
们所看到的是一个受特定的风俗习惯、制度和思想方式剪辑过的世界。