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[听力文摘] 听力文摘第28期:夜视为何看不见颜色
Night Vision And Humans: Why Can't We See Color?夜视:人类为何看不见颜色? When we are in a fairly dark room, or outside at night away from lights, we can still see, but we can'2012-07-06 编辑:rainbow
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[听力文摘] 听力文摘第27期:为什么天空不是统一的蓝色
Why The Sky Is Not Blue为什么天空不是统一的蓝色Look at various parts of the sky on a clear day and you will see that it is not a uniform blue. Even if the sky is deep blue when you look straight up,2012-07-05 编辑:rainbow
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[听力文摘] 听力文摘第26期:水下的朦胧世界
The Blurry World Underwater水下的朦胧世界When you open your eyes underwater, things look blurry, but with goggles, everything looks perfectly clear. Why can't we landlubbers focus underwater2012-07-04 编辑:rainbow
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[听力文摘] 听力文摘第25期:有一种沸腾能冷却你的食物
The Rolling Boil That Cools Your Food有一种沸腾能冷却你的食物!When you think of something boiling, you probably picture a pot on the stove, but there's another kitchen appliance that brings2012-07-03 编辑:rainbow
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[听力文摘] 听力文摘第24期:为何冰箱会发出声音?
Why refrigerators hum?为何冰箱会发出声音?Why refrigerators hum,on toay's moment of science.On the recent program we have discussed how fluorocarboncoolant cools your food by coming to a boi2012-07-02 编辑:rainbow
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[听力文摘] 听力文摘第23期:曾经的山顶洞人
Sometime Cavemen曾经的山顶洞人From the bestselling novel2012-06-29 编辑:rainbow
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[听力文摘] 听力文摘第22期:蚕丝生产的秘密知多少?
Secrets Of Silk Production蚕丝生产的秘密Fifteen hundred years ago in China, silk production was a state secret.在1500年前的中国,蚕丝的生产方法是国家机密。The silk trade was so valuable that anyone w2012-06-28 编辑:rainbow
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[听力文摘] 听力文摘第21期:缓慢的生存
Survival Of The Sluggish缓慢的生存Silkworms have been bred over thousands of years to behave quite unlike their caterpillar cousins in the wild. That's because people purposely breed silkworm2012-06-26 编辑:rainbow
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[听力文摘] 听力文摘第20期:中年发福伤不起
The Mathematics Of Middle-Age Spread中年发福伤不起Let's say you're an 18 year old male who runs every other day, logging 12 miles a week.假设你是一个18岁的男性,每隔一天就会跑步,算下2012-06-25 编辑:rainbow