光敏成像管

New Camera Takes Billions of Pictures Every Second 能每秒拍摄数十亿张照片的相机_ Imagine a camera that can take one hundred billion pictures a second -- that is enough to record the fastest movements in the universe. But we do not have

发表于:2018-12-16 / 阅读(29) / 评论(0) 分类 2015年VOA慢速英语(一)月

Helen turned on her flashlight. Nothing happened. The light did not come on. There was no light. What was wrong with her flashlight? She unscrewed the top of the plastic flashlight. Helen took the two batteries out of the plastic tube. She looked at

发表于:2019-01-02 / 阅读(53) / 评论(0) 分类 超级简单英语阅读

After hundreds of years, the most common, basic microscopes still operate by means of the same old hardware: the lens. But what if you could do away with that lens and create a microscope that fits on a cell phone? Thats what researchers led by Aydog

发表于:2019-01-02 / 阅读(35) / 评论(0) 分类 60秒科学

After hundreds of years, the most common, basic microscopes still operate by means of the same old hardware: the lens. But what if you could do away with that lens and create a microscope that fits on a cell phone? Thats what researchers led by Aydog

发表于:2019-01-08 / 阅读(58) / 评论(0) 分类 Scientific American(六)月

Juice Infused with Microscopic Particles Offers 'Unparalleled' View of Gut A new imaging technique involving a specially-prepared liquid that patients drink could help doctors better diagnose and eventually treat illnesses in the gut. The small intes

发表于:2019-01-14 / 阅读(73) / 评论(0) 分类 VOA标准英语2014年(七月)

Helen turned on her flashlight. Nothing happened. The light did not come on. There was no light. What was wrong with her flashlight? She unscrewed the top of the plastic flashlight. Helen took the two batteries out of the plastic tube. She looked at

发表于:2019-01-24 / 阅读(63) / 评论(0) 分类 英语第1级听力-English Level 1
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