He has a talent for sketching.

He sketches in the park every day.

In this chemical reaction, cyclododecane is the main product.

This mirror is made with a convex lens.

This material has very high plasticity.

The anal fin of this fish is very distinctive.

He felt pain in his buttock.

I am working like a gofer at the company.

It's my daily routine to go for a moderate run in the park every morning.

While playing in the park, I ended up falling on my butt.