Quadtree
[計] 四樹, 四叉樹
??? 情景例句
What can I do to cheer her up?
我要怎么做才可以讓她振作起來？
They are more interested in profit than beauty or health.
他們對于利益比美麗或健康更感興趣。
Mrs.Ramsay received an anonymous letter.
拉姆齊太太收到一封匿名信。