The elusive Planet X is, however, shrouded by a dust cloud that bounces sunlight back to the Sun, except for those rare moments when the angle of reflection is just right.
行星X行踪飘忽，躲躲藏藏，被尘埃云雾包裹着，除了反射角度刚刚好的稀有时刻外，都将阳光反射回了太阳。
The Angle of incidence equals the Angle of reflection.
入射角等于反射角。
The Angle of incidence equals the Angle of reflection.
入射角等于反射角。
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