I am planning to go to Inner Mongolia, an autonomous region of China, next week.

I have been to Outer Mongolia.

I have been to Chicago.

He is an expert in geophysics.

He believes in the geocentric theory.

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

A terrestrial planet may have an environment similar to Earth.

Please refer to the diagram above.

Theoretically, this experiment should succeed.

He was forced to quit sports for medical reasons.