What is the difference between a porch and a screen?

the difference between partition and porch: partition is a wall, which is airtight. Generally speaking, it is a light wall, which is not load-bearing, and is mostly used for dividing indoor space. The partition is continuous, which is used for indoor functional partition, and has the requirement of light and air permeability, and is mostly used between dining room and living room, or between porch and hall.