Earth science is an important field of study for unraveling the mysteries of nature.

The three friends of winter are planted in his garden.

Global warming is a big issue that affects all of us.

He is an expert in geophysics.

He believes in the geocentric theory.

A terrestrial planet may have an environment similar to Earth.

He is brushing his upper teeth.

Please refer to the diagram above.

As a matter of fact, he is the leader of our team.

He was promoted to admiral in the navy.