This recipe uses a fixed quantity of ingredients.

He has the ability to solve that problem.

He shows his innate field of skill when he plays the piano.

He is a very competent bureaucrat.

The ministers are involved in important policy decisions.

He solved the problem by cutting it in two with one stroke.

Quantum number is an important concept in physics.

I am planning to go to Gangneung, South Korea next week.

The opinions of both sides were completely different.

He is always fulfilling his duties as a law-abiding citizen.