Cerebrospinal fluid plays an important role in protecting the brain and spinal cord.

Everyone, please have a good new year.

This equation has homogeneity.

Solving a linear equation is difficult.

Keijiro is my best friend.

Sennenji is my best friend.

He always sticks his nose into other people's business like a busybody.

He was affected by secondary effects.

He enjoys derivative works of anime.

Saburo is my best friend.