He is majoring in philosophy.

The procedures to obtain a new visa are complicated.

He is a famous philosopher.

My father works at an ironworks.

His way of thinking is very philosophical.

He is a famous philosopher, influencing many people.

He turned thirty years old.

This picture is fixed to the frame.

This plant needs oxygen to perform photosynthesis.

In this story, Zuan is the protagonist, and his adventure continues.