If you were to look at it from a helicopter, you would be actually able to look through and see that some of the glass tiles have a solar cell behind them and some do not.
만약에 헬리콥터에서 본다면 유리 타일 뒤에 태양전지가 있는지 없는지 궤뚫어 볼 수 있긴 합니다.