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cataracts是什么意思

cataracts

英['kætərækts] 美['kætərækts]

n. 大瀑布( cataract的名词复数 )，<医>白内障；

柯林斯高阶英汉双解学习词典释义

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白内障

Cataracts are layers over a person's eyes that prevent them from seeing properly. Cataracts usually develop because of old age or illness.
例句
In one study, light smokers were found to be more than twice as likely to get cataracts as non-smokers... 研究表明，即使抽烟不多的人也比不抽烟的人患白内障的概率高出一倍多。 Age is not a factor in cataract surgery. 年龄并不是影响做白内障手术的因素。
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大瀑布

A cataract is a large waterfall.

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