单词:electron donative group
单词:electron donative group 相关文章
In the year 1620, Native Americans met the English settlers who arrived in the town of Plymouth, Massachusetts. Those settlers, known as Pilgrims, helped launch the United States as we know it today. But for the Native Americans who had long been liv
efficiency-效率,功效 elaborate -精心计划的,详尽的 elastic -橡皮圈,松紧带 elbow -肘,肘部 elderly-较老的,年长的 elect -选举,推举 electrical -电的,电气科学的 electron-电子 electronic -电子的 elegant -优美的,文雅的 element -元素,要素 elementary-基本的,
In the square outside the British Library in London is a sculpture of Sir Isaac Newton - The first man who asked why apples seem always to fall towards the centre of the earth. Maybe they chose it for the spot because it shows a great scientist at wo
THIS IS AMERICA - Minnesota State Fair Holds Big Sing Along Welcome to THIS IS AMERICA in VOA Special English. Im Barbara Klein. And Im Christopher Cruise. This week, we visit the Minnesota State Fair for its Giant Sing Along. We also learn about a p
OK, great, we smell vibrations. How? All right? 好吧,我们闻到的是震动。怎么闻到呢? Now when people ask this kind of question, they neglect something, which is that physicists are really clever, unlike biologists. 当人们问这个问
This is Scientific American's 60-Second Science. I'm Sophie Bushwick. Got a minute? The shortest distance between two points may be a straight line, but try telling that to electrons: when current flows down a wire, these particles zig and zag, movin
AMERICAN MOSAIC - October 11, 2002: Question About Native Alaskans / Music by Raphael Saadiq / TV's Oprah Winfrey Wins a Special Emmy HOST: Welcome to AMERICAN MOSAIC --VOA’s radio magazine in Speci
Three Scientists Win Nobel Prize in Chemistry Three scientists have won the Nobel Prize for chemistry for their work to simplify and improve the imaging of biomolecules. 三位科学家因为在简化和改善生物分子成像方面的成就获得了诺
The Complex Issue of Metis Identity A debate over identity is playing out over a people most Americans have never even heard about. The group are called Mtis, a French word for mixed. They are the descendants of French animal trappers and native wome
By Joseph Mok Washington, DC 12 June 2006 watch Black Eagle report Black Eagle, a Native American drum group from Jemez, New Mexico, has successfully melded its unique native Towa language singing with powwow drumming. VOA's Joseph Mok reports on th
By Indonesian service, Crystal Park Washington, D.C. 24 November 2006 watch Muslim Rap report Critics of American rap music say it glamorizes thug life, and contains too many violent themes and profanity. But one Muslim rap trio, known as Native Dee
[0:0]efficiency效率,功效 [0:12.1950]elaborate elastic elbow elderly精心计划的,详尽的 橡皮图,松紧带 肘,肘部 较老的,年长的 [1:2.6076]elect electrical electron选举,推选 电的,电气科学的 电子 [1:41.1372]electronic elegant element elementary [2:36.2790]el
But this still doesn't explain why light is able to pass through glass rather than being absorbed as with most solids. 但是这还是不能解释为什么光可以穿透玻璃而不是像其他大多固体那样被吸收。 For that, we need to go a
What this means in practice is that you can never predict where an electron will be at any given moment. You can only list its probability of being there. In a sense, as Dennis Overbye has put it, an electron doesnt exist until it is observed. Or, pu
Finally, in 1926, Heisenberg came up with a celebrated compromise, producing a new discipline that came to be known as quantum mechanics. At the heart of it was Heisenberg's Uncertainty Principle, which states that the electron is a particle but a pa
Neutrons and protons occupy the atom's nucleus. The nucleus of an atom is tinyonly one millionth of a billionth of the full volume of the atombut fantastically dense, since it contains virtually all the atom's mass. As Cropper has put it, if an atom
The Microscopic Technique Each advance in microscopic technique has provided scientists with new perspectives on the function of living organisms and the nature of matter itself. The invention of the visible light microscope late in the sixteenth cen