The patrol boat is patrolling the sea area.

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

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

The shipworm is known for eating wood.

We crossed the sea by catamaran.

He engaged in an extravehicular activity from the spaceship.

He is undergoing training for extravehicular activity.

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.