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英语听力文摘 English Digest 485、看不清?眯眼睛

时间:2012-02-04 06:49来源:互联网 提供网友:Jessicalv   字体: [ ]
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Is squinting1 really that effective?

眯眼睛真的有效吗?


 

Male: Thanks for coming on this fact-finding trip with me and share the driving.

Female: Glad to do it. It should be a fun trip. I imagine I will learn a lot.

M: I hope so. So i think we are getting close to our exit.So I'll keep an eye on it.For there is a sign but I can't quite make it out.

F: Donne, you're squinting to see the sign. Does that really help?

M: It really does. I can read it now when I am squinting.

F: Let's see now.Light enters the eye from many directions. The lens of the eye bends these rays so that they come together at a focal point. When the rays come together at the retina, the image is in focus. If this focal point is in front of the retina, close objects are clear–nearsightedness; if it is behind the retina, distant objects are clear– farsightedness.

M: Right.Now because they are bent2 more, the rays that pass near the edge of the pupil are blurred3 more. If you can eliminate these edge rays then you will have less blurring4.

F: That must be what squinting does.

M: Exactly.Squinting uses the eyelids5 to block the blurred rays that enter the pupil near its edge. Squinting is not a long-term solution to poor vision, but it sometimes helps in a pinch.

M: Ah,I think we can end this field trip now.I've learned about all I can stand for one day.

男:谢谢你来跟同我一道进行实地考察。

女:很乐意!应该会很有趣的。我觉得我也会学到很多东西。

男:但愿如此!我想我们正在靠近出口了,所以我要集中精力,因为有个地方我总是辨别不出来。

女:多恩,你(眼睛)眯着看东西,真有帮助吗?

男:是的。当我眯着眼睛的时候就可以认出来。

女:让我们现在来看看。光线从四面八方进入到人的眼睛里,眼睛里的晶状体会使这些光线转向,好让它们聚集到同一焦点。当光线聚集到视网膜,清晰的图像就形成了。如果该聚焦点在视网膜前,进出的东西就会很清楚—— 即近视;如果在视网膜后,远处的东西就很清楚—— 即远视。

男:正确!现在由于它们太过倾斜了,经过瞳孔边缘的光线就会被模糊掉。如果你能消除这些边缘的光线,你就会看的清楚些。

女:那就是眯眼睛的效果。

男:完全正确。眯眼睛(的时候),眼皮阻挡了进入瞳孔边缘地区的光线。可这只是在必要时有些帮助,并不是一个解决视力差的方法。

女:阿,我觉得我们现在可以结束这次旅程了。我已经学到了一天能承受的量了。


 


点击收听单词发音收听单词发音  

1 squinting e26a97f9ad01e6beee241ce6dd6633a2     
斜视( squint的现在分词 ); 眯着眼睛; 瞟; 从小孔或缝隙里看
参考例句:
  • "More company," he said, squinting in the sun. "那边来人了,"他在阳光中眨巴着眼睛说。
  • Squinting against the morning sun, Faulcon examined the boy carefully. 对着早晨的太阳斜起眼睛,富尔康仔细地打量着那个年轻人。
2 bent QQ8yD     
n.爱好,癖好;adj.弯的;决心的,一心的
参考例句:
  • He was fully bent upon the project.他一心扑在这项计划上。
  • We bent over backward to help them.我们尽了最大努力帮助他们。
3 blurred blurred     
v.(使)变模糊( blur的过去式和过去分词 );(使)难以区分;模模糊糊;迷离
参考例句:
  • She suffered from dizziness and blurred vision. 她饱受头晕目眩之苦。
  • Their lazy, blurred voices fell pleasantly on his ears. 他们那种慢吞吞、含糊不清的声音在他听起来却很悦耳。 来自《简明英汉词典》
4 blurring e5be37d075d8bb967bd24d82a994208d     
n.模糊,斑点甚多,(图像的)混乱v.(使)变模糊( blur的现在分词 );(使)难以区分
参考例句:
  • Retinal hemorrhage, and blurring of the optic dise cause visual disturbances. 视网膜出血及神经盘模糊等可导致视力障碍。 来自辞典例句
  • In other ways the Bible limited Puritan writing, blurring and deadening the pages. 另一方面,圣经又限制了清教时期的作品,使它们显得晦涩沉闷。 来自辞典例句
5 eyelids 86ece0ca18a95664f58bda5de252f4e7     
n.眼睑( eyelid的名词复数 );眼睛也不眨一下;不露声色;面不改色
参考例句:
  • She was so tired, her eyelids were beginning to droop. 她太疲倦了,眼睑开始往下垂。
  • Her eyelids drooped as if she were on the verge of sleep. 她眼睑低垂好像快要睡着的样子。 来自《简明英汉词典》
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