Rayox
二氧化钛
🗣️ 情景例句
I wouldn't be surprised if your son goes to harvard.
我觉得你儿子很有希望上哈佛。
Why? What will you wear?
为什么？你会穿什么？
It was upon this principle that the first instruments were made,
据这一原理，制造出了最初的地震仪器，