It's difficult to handle this machine.

My zodiac sign is Cancer.

He is suffering from acute leukemia.

He contracted severe invasive streptococcal disease and underwent emergency surgery.

The National Research and Development Agency plays a crucial role in advancing science and technology.

We traveled to the southern island for summer vacation.

A song praising his courage was playing.

He assisted my project.

He is an important character.

This mutetrahedron plays a very important role in the world of mathematics.