单词：short-focus lens
单词：short-focus lens 相关文章
AMERICAN STORIES - Short Story: The Diamond Lens by Fitz-James O'Brien (Part 2) Now, the Special English program, AMERICAN STORIES. (MUSIC) Our story is called The Diamond Lens. It was written by Fitz-James O'Brien. Today we will hear the second and
2011年VOA慢速英语(六)月
The Blurry World Underwater When you open your eyes underwater, things look blurry, but with goggles, everything looks perfectly clear. Why cant we landlubbers focus underwater without goggles? First, we need to explore how our eyes focus when were h
英语听力文摘 English Digest
AMERICAN STORIES - Short Story: The Diamond Lens, Part 1, by Fitz-James O'Brien SHIRLEY GRIFFITH: Now, the Special English program, AMERICAN STORIES. (MUSIC) Our story today is called The Diamond Lens. It was written by Fitz-James O'Brien. We will te
2011年VOA慢速英语(六)月
Like glasses, contact lenses work by bending light rays just the right amount to make the object come into focus on the retina at the back of the eye. Sometimes the eyes natural lens has an imperfection or may not be shaped properly, which can make y
英语时差8，16
Making Contact 为什么戴隐形眼镜看东西更清楚？ Don:I get contact lenses to replace my glasses and its like Im seeing the world through new eyes. Its miraculous ! Yal: Acutlly, Don, there is nothing miraculous about it. D: Who tell? Y: W
英语听力文摘 English Digest