cataract是什么意思,cataract怎么背,怎么记,cataract的词根词缀巧记速记方法,cataract构词,构成,中文翻译_英语词典

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cataract 大瀑布（cata+ract 冲→向下冲→瀑布）

释义2： cataract
/ 5kAtE7rAkt /

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◙ noun
1. a large waterfall
• 大瀑布
  a sudden rush of water; a downpour
• 急流，奔流；倾盆大雨
 »the rain enveloped us in a deafening cataract.
  震耳欲聋的暴雨把我们包围了。
2. a medical condition in which the lens of the eye becomes progressively opaque, resulting in blurred vision
• 白内障
 »she had cataracts in both eyes.
  她两只眼睛都有白内障。1. late Middle English: from Latin cataracta 'waterfall, floodgate', also 'portcullis' (medical sense 2 probably being a figurative use of this), from Greek kataraktēs 'down-rushing', from katarassein, from kata- 'down' + arassein 'strike, smash'

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