- 我在大学主修化学。
I majored in chemistry at the university.
- 水的化学式为H-O-H。
The chemical formula for water is H-O-H.
- 他的化学很差。
He is poor at chemistry.
- 我对化学略懂一二。
I have some acquaintance with chemistry.
- 物理和化学你更喜欢哪个？
Which do you like better, physics or chemistry?
- 我发现了他在化学方面的天赋。
I found him a genius at chemistry.
- 由于一些工厂使用矿物燃料，化学品的排放已经产生严重的环境问题。
As a result of some factories using fossil fuels, chemical emissions have already caused serious environmental problems.
