Sinuidal
正弦波; 正弦形
🗣️ 情景例句
She said she'll call you later.
她说她等会儿给你电话。
One enemy can do more hurt than ten friends can do good.
十个朋友做的好事抵不上一个敌人造成的危害。
He was late again. It's typical of him to keep everybody waiting.
他又迟到了。他的特点就是让别人等他。