In organic chemistry, a cycloalkane is a compound with a structure in which carbon atoms are linked in a ring.

The concert at the Rose Bowl was wonderful.

A large gathering of fans was at the concert.

A roadrunner can run very fast.

Tyrosine is one of the important amino acids.

It's difficult to solve this hexagonal puzzle.

Mr. Rokkaku is my best friend.

The kangaroo is a species native to Australia.

He is interested in the design of rocket engines.

She had a new locket around her neck.