...下，用宝石显微镜观察，有的可见原来碎块的界限(原来碎块表面的杂质残留而显现)，不同的清澈区(Clear Area)与云雾区(Cloudy Area)反映出原来碎块的特征；在反光或斜射光下，用放大镜观察，有的可见不规则的斑块界线。
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A cataract is a cloudy area in the lens of the eye that blocks the normal passage of light through the eye.
白内障是指眼内晶状体的浑浊区域阻碍了光线正常进入眼内。
A cataract is a painless, cloudy area in the lens of the eye that blocks the passage of light to the retina, the nerve layer at the back of the eye, usually causing vision problems.
白内障是指眼内晶状体的无痛性浑浊阻碍了光线到达视网膜(眼球后部的神经层)，从而引起视力问题。
So you missed the 2011 extreme supermoon due to cloudy skies in your area; not to worry.
如果因为多云的天气而使你错过了2011年得超级月亮现象的话，别担心。
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