Sinuidal
正弦波; 正弦形
🗣️ 情景例句
Can I help you?
我可以帮上忙吗？
Why don't you get dressed now?Put on your work clothes.
为什么你不现在穿好衣服?穿上你的工作服。
It's no good trying to persuade me. You won't succeed.
劝我没用。你不会成功的。