The van der Waals force is an important concept in explaining intermolecular interactions.

He has a high ability to hold a conversation, so he can get along with anyone quickly.

His running ability is the best in the team.

His control greatly contributed to the team's victory.

The destructive power of that hurricane was stronger than anything we could imagine.

Her ability to draw is really amazing.

The prevention of venereal diseases is most important in safe sexual behavior.

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

I use plain flour to make bread.

He proposed a new theory about quantum mechanics.