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
You and I will talk this over.
我俩商量商量。
She feels pity for him.
她同情他。
I had at half past twelve.
我在12点半吃的。