I noticed that my thyroid has gotten a little bigger.

This constancy is very important for living organisms to survive.

They began preparations to siege the castle.

They besieged the enemy's castle.

He recognizes the importance of oral history.

Aspergillus is an indispensable fungus in Japanese sake brewing.

Aspergillus plays an important role in the production of traditional Japanese food.

Aspergillus is an indispensable microorganism in the production of traditional Japanese food.

My dream is to visit the Imperial Palace.

He is an expert in clockwork.