Polydialkysiloxane
聚二烷基硅氧烷
🗣️ 情景例句
why you have so many problems with math.
为什么你在数学方面有那么多问题。
My uncle is a high school principal.
我的叔叔是一位高中校长。
Sorry, I haven't. Why don't you ask Jim.
对不起，我没见。你为什么不去问问吉姆呢？