Sinuidal
正弦波; 正弦形
🗣️ 情景例句
With great tact, Lily said that it was time for her to go.
莉莉机智地说她该走了。
If they say you are good,ask yourself if it be true.
若有人称赞，自问对不对。
Dan was most surprised when he heard the news.
丹听到这个消息后，惊奇万分，