Postorder traversal
[计] 后序遍历
🧩 词语组成解析
[计] 后根次序
[计] 遍历
🗣️ 情景例句
Be careful, I think the neighbors have been spying on us.
小心点，我觉得我们邻居一直在窥视我们。
A young man married is a man that's marred.
男子早婚，种下祸根。
7 p.m. Will you be free then?
晚上7点。那时你有空吗？