He likes to take a walk in the park at dusk.

Functional analysis is a branch of mathematics that studies the properties of functions in infinite-dimensional spaces.

I learned the basics of conformational analysis in chemistry class.

We should always remember the power of Kannon in difficult times.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.