My boyfriend gave me a gift.

Everyone was surprised by the news.

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

When he opened the door, a metallic sound echoed.

Alkali metals are very reactive chemically.

Transition metals play an important role in chemical reactions.

The advancement of science and technology has greatly changed our lives.

He is good at solving technical problems.

Information technology plays a very important role in modern society.

He is a very excellent technician.