He faltered due to nervousness.

What is the volume of this box?

Molybdenum is an important element in the production of steel.

Moldova is a small country in Europe.

This substance has an amorphous property.

The forest green tree frog, a species endemic to Japan, has a beautiful green body.

He is using morphine to alleviate pain.

He decided to train in seclusion on a mountain for self-improvement.

He is training in seclusion on a mountain to become stronger.

String theory is a branch of physics that is a theory for understanding the basic structure of the universe.