His explanation was impossible to understand.

Physics and chemistry classes are very difficult.

The culture of Latin America is very rich and attractive.

He handled the issue with delicacy.

He is majoring in physical chemistry at university.

My child attends a supplementary school every Saturday.

I plan to travel to South America next year.

My computer needs a recovery.

After the system crashed, we immediately started to recover.

These glasses are made of polycarbonate.