The room itself is about 120 square feet and has one big window with a view of an adjacent roof.
放置设备的房间大约有120平方英尺（大约11平方米），有一扇大窗户，正好可以看到临近的屋顶。
2
Although those cities have cold winters, they are heat islands in the summer, with hundreds of thousands of square feet of roof surface absorbing energy.
尽管那些城市有寒冷的冬季，到了夏季，这些城市就是热岛，有数十万平方英尺的屋顶在吸收热量。
3
Rather than being perfectly square or rectangular, the keys have one rounded, curved side, giving them the look of a tooth or roof shingle.