According to a law of physics called Boyle's law, the pressure times the volume of a gas is always a constant--increasing pressure makes volume decrease, and vice versa.
Boyle's law demonstrates how the pressure is indirectly proportional to volume.
Boyle's law demonstrates how the pressure is directly proportional to volume.
suppose the laws were weaker and poorly enforced
There is nothing odd to see here.
The couple are touching each other's hands.
Yes, that sounds great.
The boy is going into the water
A has no teeth.