His achievements are very impressive.

He works digging out coal.

I can't forget the impression when I ate kaiseki for the first time.

He is an expert in petrochemistry.

This beautiful lapis lazuli necklace is my favorite.

She likes collecting gemstones.

My favorite book is Harry Potter.

Numerical analysis is a branch of mathematics that studies techniques and theories for solving mathematical problems numerically.

He is an expert in chemical analysis.

The police started chasing the criminal.