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
It probably means we can't stay.
看来我们不能待在这儿了。
I ought to keep cool.
我应该保持冷静。
They play it like this, six students stand in a row in front of the class.
6个学生在全班前面站成一排。