Quadtrees
四元树
🗣️ 情景例句
Stop flirting with me.
别跟我调情！
Does it make any difference to you whether we have our lesson at two o'clock or at three o'clock?
我们在两点上课还是在三点上课，你觉得有关系吗？
Sorry, I don't know. My watch is at home.
对不起，我不知道，我把表放在家里了。