Quadtrees
四元树
🗣️ 情景例句
Um ... where's Mom?
唔……妈妈呢？
Necessity (or Need) has (or knows) no law.
需要面前无法律。
Soon, the bees in the hive flew out.They flew right to the dish.
很快，蜂箱里的蜜蜂飞了出来，它们径直朝碟子飞去。