Retrieval tree
[计] 检索树
🧩 词语组成解析
retrieval
[ri'tri:vəl]
n. 收回，挽回;检索;
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
Keep your chin up.
别灰心。
Why are you crying?
你为什么哭？
He had a good many friends here.
他在这儿有很多朋友。