Quadtrees
四元树
🗣️ 情景例句
Do you still live there?
你现在还住那儿吗？
I'm the youngest.
我最年轻
Meanwhile, a microphone, which was lowered into the mine two hours ago, has enabled the men to keep in touch with their closest relatives.
与此同时，两个小时以前放下井去的一只麦克风使井下的人可以与其亲属保持联系。