Hypocycloidal
内圆滚线
🗣️ 情景例句
When can I do that? I'd be happy to.
我什么时候可以去看 我很乐意做这项工作。
Who am I supposed to see?
我应该去见谁？
Haven't you heard of him? He's a very famous singer. He's singing at the New Theatre on Saturday.
你没听说过他吗？他是个著名歌手。他星期六将在新剧院演出。