When light enters water, the angle of refraction changes.

The pheasant-tailed jacana, known as 'the ballerina of the water' for its beautiful appearance.

The calculation of the spherical angle is a part of geometry.

This sword is made of iron.

He bought a gold necklace.

He bought a gold necklace.

He became a wealthy person at a young age.

Because he is a wealthy person, he can buy anything.

I can hear the sound of a bell.

He was playing the guitar at the street corner.