Rayox
二氧化鈦
??? 情景例句
I wouldn't be surprised if your son goes to harvard.
我覺得你兒子很有希望上哈佛。
Why? What will you wear?
為什么？你會(huì)穿什么？
It was upon this principle that the first instruments were made,
據(jù)這一原理，制造出了最初的地震儀器，