Quadtrees
四元树
🗣️ 情景例句
Is something bothering you?
有什么事烦你吗？
Better a bachelor's life than a slovenly wife.
过光棍生活，胜过有一个邋遢老婆。
Unfortunately you'll have to pay the fine before you check those books out.
在你借书之前你要先付清罚款。