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

The anus is a part of the digestive system and plays a role in excreting unnecessary substances from the body.

He is good at controlling that game.

He is completely controlling the robot.

A sphincter plays a role in opening and closing certain parts of the body.

I go jogging every day.

Do you remember where you put the remote control?

He is operating a radio-controlled helicopter.

I am studying Japanese.

That is my personal issue.