Poid
形心(曲线), 拟正弦线, 膺正弦线, 瞬心轨迹
🗣️ 情景例句
Ms Li, welcome on board.
李小姐，欢迎加入我们！
To wait patiently
耐心等待
Then he spoke slowly, but I could not understand him.
于是他说得慢了，可我还是听不懂。