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.

Gravitational interaction creates attraction between objects.

Please infer the content of the blank from the context before and after the sentence.

That movie contained many anachronistic elements.

According to the flower calendar, this month is the season for cherry blossoms.

We are planning to establish a new joint venture.

The phone rang immediately after he left the room.

This river and that river confluence here.

Please don't forget your PIN number.