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

The pupillary sphincter adjusts the size of the pupil according to the intensity of light.

The vesical sphincter plays a crucial role in controlling the excretion of urine.

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

Dysfunction of the sphincter of Oddi is considered a type of gallstone disease.

I saw the sunset at Kinmen Bay.

He is a money worshipper, thinking that money is everything.

The government issued a curfew to prevent the spread of the new coronavirus.

Metallic bonds are formed by ions floating in a sea of electrons.

A metallic bond refers to a strong bond between metal atoms.