Sigmoidal
反曲
🗣️ 情景例句
Mike and I had a hamburger at the diner. Mike
和我在火车厢餐厅那里吃了汉堡。
Would you mind closing the window for me?
能帮我关一下窗户吗？（你介意关下窗户吗？）
Come on, you can do that.
来吧，你能做到的。