用英语表达简单的物理实验过程

Take a cup, fill three quarter of it with water, cover the cup with a piece of paper, then turn it over. the paper will not fall. this shows that the atmospheric pressure outside and inside of the cup is the same.

This ia a physical experiment on pressure.
First,you should take out a glass and fill up three forths of it with water.
Then,you should cover it with a piece of paper and turn it over.
As a result,the paper will not fall.
It shows that the pressure outside is the same as it inside.

This is a physics experiment on the pressure,

Take a glass, put 3 / 4 of the water, and then in the cup on the cover with a piece of paper, flip it over, can not paper over, This shows that the atmospheric pressure outside and within the same atmospheric pressure.