The animal kingdom is known for its diversity and complexity.

He was released from the suffering of this world.

Learning about the history of the frontier is important for understanding our past.

I have been in a long-term association with him.

Dating with compensation is prohibited by law.

The problem of finding the least common multiple is one of the basic problems in mathematics.

They learned about the least common multiple in math class.

I plan to spend this year's Christmas with my family.

The time has come to reap the rice in the paddy field.

The meeting with him was very meaningful.