三级aa视频在线观看-三级国产-三级国产精品一区二区-三级国产三级在线-三级国产在线

您現在的位置: Language Tips> Easy English> Odd Question  
 





 
人為什么會眨眼
[ 2007-12-20 14:16 ]

你知道嗎,我們人類平均每分鐘要眨眼十幾次,每2到6秒鐘就要眨一下。這是一種不自覺地運動。那么,人類為什么要這樣眨眼呢?下面這篇文章就來為您講述一下。

Blinking, as opposed to batting, our eyes automatically supplies two forms of moisture to our eyes, to keep them from drying out, and to keep foreign matter from entering and irritating our eyes. Eyelids themselves, our built-in "wind-shield wipers," are merely folds of skin, controlled by muscles capable of expanding and contracting so rapidly, that blinking does not impair our vision. Mother Nature lined the rims of our eyelids with 20-30 sebaceous, oil-producing glands, which are located between our eyelashes, and are invisible to the naked eye. Blinking automatically coats the eyelid and eyelashes with the lubricant it secretes, to prevent them from drying out.

Blinking also protects the eye from dryness by irrigating, not by irritating, the eye, The eyelid, through suction, automatically draws the fluid we cry with from the well we refer to as the tear duct over the eyeball, to irrigate, and to moisturize the eye. The process is similar to the manner in which the farmer uses water to irrigate his crops during a dry spell.

Yet another benefit of blinking, is to shield the eye from foreign bodies. Our eyelashes, short, curved, hairs, attached to the eyelids, serve as dust-catchers, as the blinking reflex causes them automatically to lower, when exposed to harsh elements. Nature endowed the camel with extraordinarily long, curly, eyelashes, to protect his eyes from sudden sandstorms in the desert. Incidentally, the "camel eyelash" look is one many women attempt to duplicate by using an eyelash curler! Eyebrows, by the way, also serve their purpose, as they catch the run-off perspiration produces.

(來源:coolquiz.com 英語點津 Annabel 編輯) 我想了解更多趣味百科知識
 
 
相關文章 Related Stories
 
 
 

本頻道最新推薦

     
  人為什么會眨眼
  Let's dance!
  快樂耶誕十二天
  Twins
  “干冰”是什么

論壇熱貼

     
  開個題目大家扯:hotel & restaurant
  追求某人
  請教工商年檢如何翻譯
  How to translate “中國老字號”into English?
  "港股直通車"怎么翻譯?
  兩免一補怎么說?




主站蜘蛛池模板: 欧美精品亚洲 | 公妇乱淫日本免费观看 | 国产在线五月综合婷婷 | 欧美特级毛片a够爽 | 国产操视频 | 99九九精品 | 91精品国产免费入口 | 欧美日韩在线播放一区二区三区 | 国产一级高清视频免费看 | 亚洲欧美一 | 中文字幕日本在线视频二区 | 日日干天天草 | 很黄很色的小视频在线网站 | 久久亚洲国产最新网站 | 国产图片综合 | 成人a视频在线观看 | 成人免费大片黄在线观看com | 免费人成黄页在线观看忧物 | 欧美成人精品第一区首页 | 91精品国产99久久 | 国产一区二区三区免费 | 午夜看黄| 国产女主播一区二区在线观看 | 三级a黄| 黄站无毒不卡秒播网站免费观看 | 六月丁香久久 | 曰曰碰天天碰国产 | 国产在线永久视频 | 久久精品在现线观看免费15 | 天天综合亚洲国产色 | 国产毛片久久国产 | 在线观看www日本免费网站 | 久久996re热这里只有精品 | 尤物视频在线 | 国产最猛性xxxxxx69交 | 日本一区二区三区四区无限 | 1024你懂的国产 | 成人免费无毒在线观看网站 | 四色在线 | 综合精品视频 | 国产人成久久久精品 |