Quadtrees
四元树
🗣️ 情景例句
He is making good progress after his operation.
他动过手术后病情大为好转。
The price of this model of cassette-player is 2500 Belgian francs at today's rate of exchange.
这个型号的录音机，按今天汇率，每台2500比利时法郎。
so you're telling me that the situation here is bad for black people.
那么，你是说这里的情况对黑人来说是很糟了。