Polydimethylsiloxane
聚二甲硅氧烷; 聚二甲硅氧烷
🗣️ 情景例句
He made up his mind to give up smoking.
他下决心戒烟。
What did you have for lunch?
你中午吃些什么？
At 2,473 metres, it is the highest mountain pass in Europe.
海拔2，473O米，是欧洲最高的山口。