The "halo cloud" was just an optical illusion caused by sunlight hitting a cloud at just the right Angle.
“光环云”是由阳光以恰到好处的角度触及云层而引起的一种光学错觉。
Oil smoothes the water surface, making it a better mirror: more sunlight is reflected back to the observer (the satellite) at the same angle as the incoming sunlight (right).
油污使水面变得平滑,让它更接近于一面镜子:更多的入射日光被反射回处于同一角度的观测器(卫星)。
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