There is a secret between him and me.

We have maintained a good relationship for a long time.

There are many interests involved in this project.

He is struggling to understand the perfect tense in English.

They built a deep emotional bond before they had a physical relationship.

In Marxism, it is said that the relations of production form the foundation of society.

The press corps covered the president's press conference.

Dango is my best friend.

The study of galaxy clusters is essential for understanding the universe.

He belonged to a medieval order of chivalry.