国产一区二区三区视频在线_蜜桃网站在线观看_欧美成人理论片乱_操操操操操_国产精品视频yy9299一区_中文字幕激情

cataract

英 ['k?t?r?kt] 美['k?t?r?kt]
  • n. [眼科] 白內(nèi)障;大瀑布;暴雨,洪水;奔流
  • vt. 傾注

TEM4IELTS低頻詞暢通詞匯

詞態(tài)變化


復(fù)數(shù):?cataracts;

助記提示


1. run, rush => race => ract- => cataract "rush down".

中文詞源


cataract 白內(nèi)障,大瀑布

cata-, 向下。-ract, 流,傾瀉,詞源不詳。原指大瀑布,后用做白內(nèi)障的委婉語(yǔ)。

英文詞源


cataract
cataract: [15] Greek kataráktēs meant literally ‘swooping down, rushing down’; it was a derivative of the verb katarássein, a compound formed from the prefix katá- ‘down’ (which appears in a wide range of English words, including cataclysm, catalepsy, catalogue, catapult – literally ‘hurl down’ – and catastrophe) and the verb rássein ‘strike’.

Hence it was applied metaphorically to various things that ‘rush down’, including waterfalls and portcullises. The word passed into English via Latin cataracta, and the sense ‘opacity of the eye’s lens’ developed in the 16th century, probably as a metaphorical extension of the now obsolete ‘portcullis’.

cataract (n.)
early 15c., "a waterfall, floodgate," from Latin cataracta "waterfall," from Greek katarhaktes "waterfall, broken water; a kind of portcullis," noun use of an adjective compound meaning "swooping, down-rushing," from kata "down" (see cata-). The second element is traced either to arhattein "to strike hard" (in which case the compound is kat-arrhattein), or to rhattein "to dash, break."

Its alternative sense in Latin of "portcullis" probably was passed through French to form the English meaning "eye disease" (early 15c.), on the notion of "obstruction" (to eyesight).

雙語(yǔ)例句


1. He is an elderly gentleman who had had a cataract operation.
他是一位曾經(jīng)動(dòng)過(guò)白內(nèi)障手術(shù)的老人.

來(lái)自《簡(jiǎn)明英漢詞典》

2. The way is blocked by the tall cataract.
高懸的大瀑布擋住了去路.

來(lái)自《簡(jiǎn)明英漢詞典》

3. Age is not a factor in cataract surgery.
年齡并不是影響做白內(nèi)障手術(shù)的因素。

來(lái)自辭典例句

4. As he stood there, this cataract on a sudden increased in volume.
他站在那兒, 這道瀑布忽然越來(lái)越大了.

來(lái)自辭典例句

5. The good news from the battlefields is becoming a cataract.
戰(zhàn)場(chǎng)上傳來(lái)的好消息正在變成一道奔流.

來(lái)自辭典例句

主站蜘蛛池模板: 男女搞网站 | 日韩综合一区 | 久久三级视频 | 欧美在线观看一区 | 国产日本一区二区 | 国产激情 | 九九九亚洲| 日本精品一区二区三区视频 | 青青久久av | 91精品国产91久久久久久吃药 | 久久国产精品一区二区三区 | 中文字幕成人网 | 黄色小视频免费观看 | 国产99久久精品一区二区永久免费 | 精品国产精品国产偷麻豆 | 久久xx| 亚洲一区二区免费电影 | 国产精品免费观看视频 | 久久久久久国产 | 久久久精品美女 | 国内精品国产三级国产在线专 | 亚洲国产精品久久久久婷婷老年 | 日韩精品一区二区三区在线 | 国外成人在线视频网站 | 中文字幕一区二区三区中文字幕 | 99精品在线看 | 操到喷水| 国产一级免费视频 | 日韩视频二区 | 久久国产精品首页 | 日韩一区二区免费视频 | 日本精品一区二区三区视频 | 久久久免费 | 久久免费看 | 日本a在线播放 | 91麻豆精品国产91久久久久久久久 | 国产一二区免费视频 | 2017天天操 | 97国产 | av免费网站在线观看 | 成人一区二区三区 |