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
and replaces it with a new glove
用一个新的手套来换它
It's up in the air.
尚未决定。
Lily was born ten minutes before me,so she says,I'm older than you! So I must open the present!
“我比你大！应该由我来拆礼物包！”