Quadtrees
四元树
🗣️ 情景例句
Do we have to pre-book tours, or can we get them on site?
我们必须预定行程， 还是到那个地方再说？
Wise men chanbge their mind, fools never.
聪明人随机应变，愚蠢者固执己见。
Most of our fears are unreasonable, but they are impossible to erase.
我们的恐惧大部分是没有道理的，但去无法消除。