这些镜子因年深日久而照影不清楚。
这些镜子可以在几千英里的高空以地球绕地轴旋转的速度运行。
The mirrors could orbit—thousands of miles high—at the same speed as the earth turns on its axis.
这些镜子由电脑控制，指导他们白天跟着太阳的位置移动而移动，在大风的天气就自动关闭。
The mirrors are controlled by a computer that directs them to turn along with the sun throughout the day and to close during windy weather.
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