When you have an open atrium inside, you are able to see what others are doing from within the building, and you have a better way to control light, and when you place the mass and the walls in the perimeter, then you are preventing direct sun radiation.
当你在内部有了一个开放的中庭时， 你就可以从内部看到别人在做什么， 你也可以更好的控制光线， 另外当你把杂物和墙壁 放在外围时， 你就可以阻止阳光的直射。