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

He is an expert in geophysics.

He was hit hard in the solar plexus during the boxing match.

The heliocentric theory is the idea that the sun, not the earth, is the center of the universe.

He believes in the geocentric theory.

A terrestrial planet may have an environment similar to Earth.

He gave me the cold shoulder.

He was able to find a solution from a difficult situation.

He said, 'See Naples and die,' and went on a trip to Italy.

I was surprised by his shabby clothes.