I lost my My Number card.

He is majoring in anthropology at university.

Cartilaginous fishes include fish such as sharks and rays.

He is majoring in ichthyology at university.

He is an excellent first baseperson.

Primates are a part of mammals that includes humans.

He is an expert in paleoanthropology, studying the lives of ancient humans.

The protection of this town is my responsibility.

On is always maintaining a calm attitude.

He was worried about starting a new project, but I advised him, 'Doing something is easier than worrying about it.'