He was always envious of others' success, saying that the grass is always greener on the other side.

He solved the problem in a scientific way.

This reaction occurs through a chemical process.

He is good at tactical thinking.

Fundamental knowledge of mathematics is necessary to solve advanced problems.

This park was completely artificially made.

She is looking for an ideal partner.

He has expert knowledge.

He is troubled by chronic headaches.

I think his ideas are revolutionary.