That person is my friend.

It is important for each person to fulfill their role.

He fell into a state of lethargy after the exam.

Understanding the transition state of a chemical reaction is important for predicting the progress of the reaction.

The negotiations have fallen into a deadlock.

He ended up in a vegetative state after the accident.

This program is designed to avoid a race condition.

I went to see a movie by myself.

Watching a movie alone is enjoyable.

He understands the importance of learning.