This jacket is made of bulletproof material.

He threw a grape bomb.

He is being oppressed by the government.

He is an expert in ethology, and his research is highly regarded worldwide.

He likes to take a walk in the park at dusk.

The ammunition depot is a part of the military facility where ammunition is stored and managed.

We should always remember the power of Kannon in difficult times.

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.