He is weak and easily gets tired.

This is a term used in biology.

The generation of today is facing unique challenges.

May God bless you with good health and happiness.

I need to buy a new pair of boots for the winter.

The sudden appearance of the comet in the sky surprised everyone.

These elements constitute a perfect equation.

He is a typical example of a hardworking student.

The workweek in Japan is typically 40 hours.

That is a strange situation.