Gender roles are an important element in defining individual behavior in society.

This project is nonessential and nonurgent, so let's finish other important tasks first.

His role is to fulfill his responsibilities as a leader.

Last night, I overate and suffered from indigestion.

The anal sphincter is an important part of the body.

The treasure container is decorated with a beautiful design.

He bought a new musical instrument.

He bought a new music player.

This incubator is an essential device for protecting the lives of newborns.

The air in this area is greatly affected by pollutants emitted from factories.