This clothing is made of cotton fiber.

In physics, the transition of energy states is an important concept.

She bought new clothes.

This ship doctor is an indispensable presence to protect the health of passengers during long voyages.

The fibers of this cloth are very fine.

His career is making a wonderful transition.

In physics, the transition of energy states is an important concept.

His fighting spirit never wavers.

He is an experienced sailor.

The ship's doctor is always working to protect the health of the passengers.