Mathematical tree
[计] 数学树
🧩 词语组成解析
tree
[tri]
n. 树;木料;树状图;宗谱;
vt. 把…赶上树;使处于困境;把鞋型插入（鞋内）;
🗣️ 情景例句
What? Who?
什么 ，是谁？
They cannot help but be grieved by the death of a friend.
眼见朋友死亡，自己却无能为力，他们感到深深的悲哀。
Our TV set was broken last week. He mended it for us.
上星期我们的电视机坏了。他为我们修好了。