He is majoring in hydrology at university.

I dream of traveling through the universe someday.

He is researching about a new energy source.

He is conducting research on a new energy source.

Her dress was a vivid lemon color, and it stood out.

Hygiene is very important in daily life.

We plan to visit the ancient remains over the weekend.

This problem can be solved by solving equations with linearity.

The tugboat was pulling a large ship into the harbor.

A new military system was introduced in the Heisei era.