情況：471Please respect copyright.ＰＥＮＡＮＡa6Uk2uDrHM
光污染太嚴重使得我們看不到星星。471Please respect copyright.ＰＥＮＡＮＡUBRWGMovQe
承上：471Please respect copyright.ＰＥＮＡＮＡMq0RoJnyy3
白天我們看不到星星。471Please respect copyright.ＰＥＮＡＮＡtTvt3LGAcL
太陽照亮了整片大地。471Please respect copyright.ＰＥＮＡＮＡ22sX2fp0B4
題：471Please respect copyright.ＰＥＮＡＮＡ2cfvi8LXCz
太陽光的光線是什麼？
