He is the most competent employee of our company.

Who is the user of this software?

This bottle is reusable.

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.

He was moved by the view from the top of the skyscraper.

This is my unused camera.

He is the chief technical officer of our company.