Production tree
[计] 产生式树
🧩 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
You are always straying from the subject.
你说话总爱跑题。
What's your impression of the United States?
你对美国的印象如何？
the waters flow more quietly, and in the end, without any visible break,
河水流得平缓起来，最后连绵不断地