Polydimethylsiloxane
聚二甲硅氧烷; 聚二甲硅氧烷
🗣️ 情景例句
Michelle picked it out.
是Michelle选的。
That man is a teacher,isn't he?
那个人是位教员，对不对？
His parents did not know what was wrong.
他的父母亲不知道他有什么毛病。