cataract

cataract — 名詞

1. a medical condition in which the lens inside the eye becomes cloudy, making it d

1.名詞B2
釋義

白內障

眼睛水晶體混濁的疾病

a medical condition in which the lens inside the eye becomes cloudy, making it difficult to see clearly. A cataract can form slowly as a person ages and may need an operation to remove it.

例句

Aunt Beatriz had cataract surgery last spring and says she can see colours again.

Beatriz 阿姨去年春天做了白內障手術，現在她說又能看清楚顏色了。

cataract surgery — common collocation for the medical procedure

Dr. Okafor told Ravi his right eye was developing a cataract and needed monitoring.

Okafor 醫生告訴 Ravi，他的右眼正在形成白內障，需要追蹤觀察。

develop a cataract — typical verb collocation for onset

同義詞
反義詞
  • clear lens

    the opposite condition — a healthy, transparent lens

文法句型

have/get + cataract

cataract surgery

develop a cataract

用法筆記

Common in medical contexts, especially discussing age-related vision problems. 'Cataract' is the condition itself; the surgical procedure is called cataract surgery or cataract removal.

常見錯誤

❌My grandfather has a cataract in his knee.
✅My grandfather has a cataract in his eye.
💡Cataracts only affect the lens of the eye, not other body parts.
❌She went blind because of cataracts in both ears.
✅She went blind because of cataracts in both eyes.
💡Cataracts affect vision, not hearing.

2. a very large, steep waterfall — often used to describe powerful rivers or dramat

2.名詞C1
釋義

大瀑布

又大又陡的瀑布

a very large, steep waterfall — often used to describe powerful rivers or dramatic natural scenery in geography or literature.

例句

The cataracts of the Nile once blocked ships from travelling upstream into central Africa.

尼羅河的大瀑布曾經阻擋船隻逆流而上前往非洲中部。

the cataracts of [river] — geographical phrase for a series of waterfalls

From the lookout the children saw a great cataract crashing into the misty gorge below.

從觀景台望去，孩子們看到一道巨大的瀑布轟然落入下方霧氣瀰漫的峽谷。

a great cataract — typical literary collocation; passive view description

同義詞
  • waterfall

    the common everyday word for falling water

  • cascade

    often suggests smaller, step-like falls rather than a single big drop

  • falls

    shorter synonym used in place names (Niagara Falls)

文法句型

the cataracts of [place]

a great cataract

用法筆記

In modern everyday English, 'waterfall' is far more common. 'Cataract' is mainly found in formal writing, historical accounts, or poetic descriptions of large waterfalls. The plural form 'cataracts' is often used for a series of waterfalls along a river.