This factory is refining high-quality olive oil.

Daisei is my best friend.

He is conducting research on a new energy source.

He is researching about a new energy source.

This is the original item.

I will decide to purchase after checking these goods.

I am majoring in developmental biology at university.

He is known as a person with learning.

I am majoring in microbiology at university.

Astrobiology is a very interesting field of study.