The altitude of this airplane is 10,000 meters.

What will you use this empty box for?

I enjoyed a picnic under the clear sky.

He wants to make a car that can fly in the air.

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

He was fascinated by the beauty of the dragonfly.

He was appointed as an air commodore.

He was promoted to the rank of Second Lieutenant in the Air Force last year.

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.