I'm troubled by his unproductive attitude.

He was affected by secondary effects.

World War I was a large-scale war that lasted from 1914 to 1918.

World War II lasted from 1939 to 1945.

Let's pray that World War III does not occur.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.

In behavioral sciences, the use of metatools plays a crucial role.

He is writing a thesis on dialectical materialism.

It is important to distance yourself from antisocial forces.

Japan's exclusive economic zone plays a crucial role in the management and utilization of marine resources.