Sinuidal
正弦波; 正弦形
🗣️ 情景例句
It was not until yesterday that I noticed it.
我一直到昨天才注意到它。
Her mirror might crack if she uses it too much!
如果她用得太过分了，她的镜子可能会坏掉哩。
He speaks little Chinese, so it's difficult to communicate with him.
他只能讲一点汉语，所以和他交流很难。