He is a specialist in surgery.

He is feeling the difficulty of swallowing.

He swallowed a large apple with difficulty.

This mass-produced item has stable quality and is also reasonably priced.

He was able to overcome his obstacle.

She looked in the mirror and was bothered by her split ends.

He looked like he had succeeded.

The parenchyma of this plant plays a role in photosynthesis and storage.

Rouran was an ancient nomadic tribe.

The boat was bobbing on the calm lake surface.