This flower has perfect bilateral symmetry.

The park is beautiful at dusk.

This lemon is sour, isn't it?

His intense attitude attracts me.

The event horizon is a part of a black hole, referring to the region from which even light cannot escape.

He is writing a paper about the event horizon.

His music composition is very unique.

It's time for dinner.

He was a very excellent student before he turned to delinquency.

The cause of his lateness was a train delay.