The external urethral sphincter is an important muscle for controlling the excretion of urine.

The urethral sphincter is a muscle that controls the flow of urine.

He is working out his muscles at the gym every day.

The internal urethral sphincter plays a crucial role in controlling the flow of urine.

This factory has significantly reduced its carbon dioxide emissions.

The factory is emitting a large amount of carbon dioxide.

Health is very important.

His opinion is very important.

He is good at controlling that game.

He is completely controlling the robot.