Quantum mechanics is a branch of physics that studies the behavior of microscopic particles.

In quantum mechanics, the state of a particle is described by a wavefunction.

His description was detailed and easy to understand.

He described the incident in detail.

The surge of the sea has become stronger.

I'm worried about his health condition.

This math problem requires an understanding of functions.

This particle is very small.

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.