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

We should always remember the power of Kannon in difficult times.

He solved the problem in a scientific way.

This reaction occurs through a chemical process.

Fundamental knowledge of mathematics is necessary to solve advanced problems.

He is good at tactical thinking.

This park was completely artificially made.

She is looking for an ideal partner.

He has expert knowledge.

He is troubled by chronic headaches.