The moon appears to be a dry and dead place. Scientists have long believed that Earth's satellite lacks the ability to hold water near its surface because it has no atmosphere. So the announcement by the United States space agency shocked many in the scientific community.
该音频有LRC字幕,点击图片查看所有含有LRC字幕的VOA慢速英语 voa慢速英语讲解:艾滋病疫苗有望取得新进展2009-09-30
AIDS researchers say they still have much work to do on a vaccine against H.I.V. But the first reports of some success have raised hopes. Scientists say an experimental vaccine reduced the risk of infection in humans by thirty-one percent and was safe.
该音频有LRC字幕,点击图片查看所有含有LRC字幕的VOA慢速英语 voa慢速英语讲解附字幕:怎样用种子榨油2009-09-29
From the beginning of human history, people have used oils from seeds and nuts. Most of the time these oils are used as food, especially in cooking. But sometimes they have other uses. For example, oils are used in paint and in cleaning products like soap.
An American study has shown a link between activity on the surface of the sun and weather conditions on Earth. Scientists say small changes in the sun's brightness can produce effects on Earth similar to two weather events in warm waters of the Pacific Ocean.
该音频有LRC字幕,点击图片查看所有含有LRC字幕的VOA慢速英语 voa慢速英语讲解:五岁以下儿童死亡率下降2009-09-28
UNICEF says the death rate for children under the age of five has fallen twenty-eight percent since nineteen ninety. Experts credit the drop to improvements in public health measures. These include vaccination campaigns and the use of bed nets chemically treated to kill mosquitoes that spread malaria.
The United States established its first national park in eighteen seventy-two. Yellowstone, in the western state of Wyoming, was not only the first national park in America. It was the first in the world.
该音频有LRC字幕,点击图片查看所有含有LRC字幕的VOA慢速英语 voa慢速英语讲解:词语典故:猫儿不在,老鼠成精2009-09-27
Cats are the most popular pets among Americans. So it is not surprising that there are many expressions about cats. Some cats like to catch small birds, like canaries. If someone looks very proud or satisfied with himself, we say he looks like the cat that ate the canary.
voa慢速英语讲解:Les Paul:他的电子吉他改变了20世纪...2009-09-27
That was the song “Lover”, first released in nineteen forty-eight. To make this song, Les Paul layered eight recordings of himself playing the electric guitar. Some of the tracks were recorded at normal speed and some were recorded at half speed. Played at normal speed, the half speed recordings sound twice as fast.The song gives a good example of Les Paul’s experimental style and inventive spirit.
He had left his laboratory in the care of his assistant, washed the chemicals from his hands and asked a beautiful woman to become his wife. In those days new scientific discoveries such as electricity seemed to open paths into the area of miracles. It was not unusual for the love of science to compete with the love of a woman.
该音频有LRC字幕,点击图片查看所有含有LRC字幕的VOA慢速英语 voa慢速英语讲解附字幕:G20领袖探讨经济和伊朗问题2009-09-26
This week, leaders of the top industrial and developing economies gathered in the eastern United States. They met in Pittsburgh, Pennsylvania, for a summit on the world's financial future. Leaders of the Group of Twenty have now met three times in less than a year to deal with the worst recession since the nineteen thirties
该音频有LRC字幕,点击图片查看所有含有LRC字幕的VOA慢速英语 voa慢速英语讲解:新提议加剧了关于网络中立性的辩论2009-09-25
Net neutrality is the idea that everything on the Internet should be treated equally. That sounds simple. But the issue is a complex mix of technical, business, political and legal questions.
voa慢速英语:Getting a Fellowship, From the Ford Foundation2009-09-25
The Ford Foundation in the United States is a charitable organization that calls itself "a partner for social change." It has a study program currently available to college graduates in twenty-two countries in Asia, Africa and Latin America.
Netflix is the world’s largest online movie rental service. It started in nineteen ninety-eight. It now has ten million paying members in the United States. This week it named the winners of a million dollar competition to improve its system for suggesting movies to its members. Jim Tedder tells about the company and the unusual competition.
Two summers had gone by since the start of the American Civil War, and the North had not yet won a major battle in Virginia. The Army of the Potomac -- the strongest of the Union armies -- had tried to seize Richmond, the Confederate capital.
Since ancient times, cultures around the world have been making and performing with puppets. They express the ideas and beliefs of human societies through stories. Puppets are lifeless objects that are controlled in such a way as to become lifelike. It is the role of the puppeteer to make these forms come alive.
Norman Borlaug led what was known as the Green Revolution. As a plant scientist, he may have saved more lives than anyone else in history -- as many as a billion, by some estimates. He traveled the world to help poor people develop better ways to produce food.
voa慢速英语:Great Pacific Ocean Garbage Patch: Where ...2009-09-22
Strokes are a major cause of death and disability. A stroke is a loss of blood flow in the brain. There are two kinds of strokes. An ischemic stroke happens when a blood vessel in the brain gets blocked. A bleeding, or hemorrhagic, stroke happens when a blood vessel breaks.
该音频有LRC字幕,点击图片查看所有含有LRC字幕的VOA慢速英语 voa慢速英语讲解:疾病威胁非洲香蕉作物2009-09-21
Two separate diseases are destroying banana and plantain crops in Africa. They could threaten food security for millions of Africans who depend on bananas as an important part of their diet.
Imagine that the calendar says it is fall and you have just arrived on a visit to Washington. The leaves on many of the trees have already begun to change color as they prepare to drop to the ground. Soon they will be gold and orange and red.
该音频有LRC字幕,点击图片查看所有含有LRC字幕的VOA慢速英语 voa慢速英语:词语典故:包含hit的短语2009-09-20
Hit is a small word but it has a lot of power. Baseball players hit the ball. Missiles hit an airplane. A car hits a tree.
voa慢速英语:Katharine Hepburn, 1907-2003: An Independent ...2009-09-20
Katharine Hepburn holds the record for the most Academy Awards for Best Actress. She won the honor four times. This star holds a special place in American film and popular culture.
该音频有LRC字幕,点击图片查看所有含有LRC字幕的VOA慢速英语 voa慢速英语讲解:奥巴马替换布什导弹防御计划2009-09-19
In two thousand six, Defense Secretary Robert Gates advised President George W. Bush to base a missile defense system in Europe. Russia objected to what it saw as threat to its security. But supporters said it was the best way to protect the United States and its European allies from countries like Iran or North Korea.
该音频有LRC字幕,点击图片查看所有含有LRC字幕的VOA慢速英语 voa慢速英语讲解:华尔街危机一周年回顾2009-09-18
One year ago, the United States financial system was in danger of collapse. One of Wall Street's oldest investment houses had just sought protection from its creditors. The Lehman Brothers bankruptcy on September fifteenth was a shock to the system, but not the only one.
该音频有LRC字幕,点击图片查看所有含有LRC字幕的VOA慢速英语 voa慢速英语讲解:自己制作肥皂2009-09-18
The oil can come from animal fat or plant sources like avocado, coconut or sunflower. Lye can be found at markets and other stores that sell cleaning products. Lye -- spelled l-y-e -- is also called sodium hydroxide or potassium hydroxide.
该音频有LRC字幕,点击图片查看所有含有LRC字幕的VOA慢速英语 voa慢速英语讲解:纪念考试培训先驱Stanley Kaplan2009-09-17
Here is a question for a college admissions test. Who was Stanley Kaplan? Did he A) start a test preparation company, B) start the test preparation industry, or C) die last month at age ninety? The correct answer is D) all of the above.
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