He has a stubborn personality and rarely changes his mind once he has made a decision.

His stubbornness sometimes causes problems.

A robbery occurred in the neighborhood last night.

I go jogging every morning before noon.

We discussed to deepen our mutual understanding.

She loves the sound of the music box.

Diamond is the hardest mineral on Earth.

Weak interaction is one of the four fundamental forces between elementary particles.

Strong interaction is one of the four fundamental forces in particle physics.

Electromagnetic interaction is one of the fundamental forces used to explain the force between substances.