Signed tree
[计] 符号表示的树
🧩 词语组成解析
signed
[saind]
adj. 有符号的，有正负之分的;
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
He is working on a book about the Vietnam War.
他正在写一本关于越战的书。
I wonder what makes you so worried.
我不知道是什么使你这样担心。
What about your sister Kate? You didn't come together, did you?
你的妹妹凯特呢？你们不是一起进校的，对不对？