Silicons
[计]（聚）硅酮, （聚）硅氧, 硅（有机）树脂
🗣️ 情景例句
What did you tell Grandpa?
那你是如何对爷爷说的呢？
We kept on discussing the problem for four hours.
我们持续讨论那个问题达四小时。
I have just received a letter from my old school, informing me that my former headmaster,
我刚刚收到母校的一封信，通知我说以前的校长