When an object is in free fall, its terminal velocity is determined by the balance between gravity and air resistance.

What is the initial velocity of this object?

He looked at the speedometer and checked the speed of the car.

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

The tachometer of my car has broken.

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.