单词：three-wavelengths
单词：three-wavelengths 相关文章
Unit 9 Text A Listening First Listening Before listening to the tape, have a quick look at the following words. greenhouse effect 温室效应 alter 改变 release 排放 carbon dioxide 二氧化碳 t
21世纪大学英语读写教程
A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Sun's very center. It is here that is to be found the source of the energy that the Sun constantly pours out into space as light and h
英语小短文
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Most plants capture sunlight. And the results are usually green. Because in photosynthesis, plant chlorophyll uses wavelengths of blue and our sun's ab
Scientific American(四)月
Bring home a bucket of fried chicken and you may find that people have strong feelings about which part of the bird is best. Well, scientists at Washington University in St. Louis say the answer is: the eyes. At least when you compare them to our own
Scientific American(二)月
One of these wavelengths corresponds to hydrogen, another wavelength would be iron. Another wavelength would be oxygen. And so you go to the part of the spectrum you are interested in and you see you'
火星生命
By David McAlary The U.S. space agency, NASA, launched a satellite Saturday that scientists hope will help them locate the sources of mysterious gamma ray explosions, the brightest most energetic burs
VOA2004（下）--健康科技
补充： Backbone - A series of high-speed network connections through which other networks connect. Bandwidth - According to Webster's: a range within a band of wavelengths, frequencies, or energies
电信英语
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. If youve ever wanted to explore the universe, your dream is now as close as your keyboard. Because last week, Microsoft unveiled its online WorldWide T
Scientific American(五)月
As it ages white paper turns a distinctive yellow. But why? To find out, scientists artificially aged modern paper to reveal the changes on the molecular level. The research is in the Journal Physical Review Letters. For 48 days, three unbleached pap
Scientific American(四)月
This is Scientific American 60 second Science I am Sophie Bushwick, got a minute? As it ages, white paper turns a distinctive yellow. But why? To find out, scientists artificially aged modern paper to reveal the changes on the molecular level. The re
Scientific American(四)月
The source of Energy A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Sun's very center. It is here that is to be found the source of the energy that the Sun constantly pours out into
英语小短文
Sunscreen comes in many forms, each with its own impacts on your body and the environment. 防晒霜有很多种，每种对你的身体和环境影响各有不同。 With so many options, how do you choose which sunscreen is best for you? 有了这么
TED演讲教育篇
RACHEL MARTIN, HOST: You've probably heard of dusting for fingerprints at the scene of a robbery or a murder. But now investigators can do the same thing for a different kind of crime - killing birds of prey. In Britain and in other parts of Europe,
英语语言学习
1. You don't have to see each other every day. 你们不必每天都见面。 If you can, then why not? But you don't have to nag each other about you or your partner coming over just because you haven't seen a glimpse of each other for the day (yet)
实用英语
It was while puzzling over this problem that Bohr was struck by a solution and dashed off his famous paper. Called On the Constitutions of Atoms and Molecules, the paper explained how electrons could keep from falling into the nucleus by suggesting t
万物简史
As physicists began to delve into this subatomic realm, they realized that it wasn't merely different from anything we knew, but different from anything ever imagined. Because atomic behavior is so unlike ordinary experience, Richard Feynman once obs
万物简史
Creating Colors There are two ways to create colors in a photograph. One method, called additive, starts with three basic colors and adds them together to produce some other colors. The second method, called subtractive, starts with white light (a mi
双语有声阅读
46.Vision Human vision like that of other primates has evolved in an arboreal environment. In the dense complex world of a tropical forest, it is more important to see well that to develop an acute sense of smell. In the course of evolution members o
双语有声阅读
The Source of Energy A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Sun's very center. It is here that is to be found the source of the energy that the Sun constantly pours out into
双语有声阅读
Vision Human vision like that of other primates has evolved in an arboreal environment.In the dense complex world of a tropical forest, it is more important to see well than to develop an acute sense of smell. In the course of evolution members of th
双语有声阅读