单词：ultraviolet and visible light detector
单词：ultraviolet and visible light detector 相关文章
In 2008 astronomers discovered surprising amounts of water molecules where planets were forming near young stars. But how, they wondered, could those molecules survive? They should have been destroyed by ultraviolet radiation. In theory, planetary du
Scientific American(十二)月
HEALTH REPORT - Health: Looking for Skin CancerBy Brianna Blake Broadcast: Tue, 4 Jul 2006 16:00:00 UTC I'm Faith Lapidus with the VOA Special English Health Report. Tanning beds produce ultaviolet ra
2006年慢速英语（七）月
Longest Lunar Eclipse of the Century This is Whats Trending Today The longest lunar eclipse of the century will happen late Friday or early Saturday, depending on where you live. The American space agency NASA says the moon will move into the Earths
2018年VOA慢速英语(七)月
AZUZ: Compared to earth's mass, Jupiter is thought to be much larger than that. And scientists say NASA's Juno spacecraft has led to new findings about Jupiter. For one thing, they believe the planet's surface has bands of gas and winds that flow ver
CNN美国有线新闻2018年4月
Sometimes it is hard to see the light, especially it lies in the invisible spectrum, like ultrared, ultraviolet radiation. But if you long to see the unseeable, you might interested to hear that under certain conditions people can catch a glimpse of
2015年Scientific American(一)月
It might be the cheeks flushing with embarrassment or a voice choking with emotion. Our physical reactions can reveal what we truly feel. And some think they can show when someone's lying. Typically when a person tells a lie, they begin to sweat. I'
国家地理2008年
A Magical Glow? Have you ever wondered why fluorescent colors, like you see in highlighters or clothing dyes, for instance,seem so much brighter than other colors? Its because they seem to reflect more light than they receive! It may sound like a mag
英语听力文摘 English Digest
Sunscreened Plants 遮光植物 A NASA researcher is finding that alfalfa plants grow more poorly when exposed to UVB -- ultraviolet B radiation from the sun. Learn more about sunscreened plants -- today on Earth and Sky. JB: This is Earth and Sky. Eart
(科普英语)Earth and Sky
Studies are finding that the vitamin known for building strong bones may also help prevent many diseases. Transcript of radio broadcast: 15 July 2008 This is the VOA Special English Health Report. Vitamin D helps bones and muscles grow strong and he
VOA慢速英语2008年（七）月
物理学 statics 静力学 motion 运动 inertia 惯性 gravitation 引力 relativity 相对 gravity 地心引力 vibration 震动 medium (media) 媒质 frequency 频率 wavelength 波长 pitch 音高 intensity 强度 echo 回声 resonance 回声，洪
托福英语
主餐一道：泛听练习 以下段落是摘自新闻里的一些重要信息,并不是一个段落的听写。空内信息可在本新闻中全部找到,大家可以根据这些信息复述新闻。 一、泛听建议： 1、完整听一遍，掌握
NPR边听边练
is a consequence of ultraviolet light, of latitude and climate. 这只不过是紫外线 纬度和气候造成的。 There really is no such thing as race. 实际上并没有什么种族。 We're one species, each of us much much more alike than we a
公众人物毕业演讲
Are Tanning Beds Safe? Millions of people go to tanning salons, some to get a base tan before they go away on a beach vacation. The idea of the base tan is that it will protect you from burning on your sun excursion, so that what you end up with is a
英语听力文摘 English Digest
还记得孙燕姿那首红遍大江南北的《绿光》吗？翻越过前面山顶、层层白云，绿光在哪里？不知道有多少人跟小编一样，以为歌里的绿光只是对幸福的比喻。而其实在现实中，绿光是真实存在
实用英语
HEALTH REPORT - Study: Sunshine and Vitamin D May Improve Lung Cancer Survival By Cynthia Kirk Broadcast: Wednesday, May 18, 2005 I'm Gwen Outen with the VOA Special English Health Report. Sunlight he
健康与经济
BEIJING, Oct. 26 (Xinhuanet) -- The question, why the first documented supernova was super-sized and grew so fast, has puzzled astronomers for centuries. Now it is solved by US researchers. The supernova, an exploded star, was observed in 185 A.D. an
英语新闻
A new 'health' trend in Hong Kong sees women staring straight at the sun in the belief that it will replace their need for food and even improve their vision and sleep quality, reports Oriental Daily. 据《东方日报》报道，香港女性中兴起
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So you want to attract mates. After all, passing on your genes is what evolution is all about. To do that you need offspring, and to get a lot of those you need to be attractive. The flashier the better. Hey, look over here! Sexy me. Ah, but theres t
英语时差8，16
With a variety of bands, and price tags ranging all the way from $349 $17,000, theres an Apple Watch for everyone. Except, possibly, the heavily tattooed. 面向大众推出的Apple Watch，款式多样，价格从349美元到17000美元不等。现在
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A man who created neon noodles is being scrutinised as he's refusing to reveal what exactly has given them their crazy colours. 由于拒绝披露关于五彩面条的上色细节，霓虹色面条的发明者受到严厉审视。 The fluorescent foo
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