VOA标准英语2010年-CT Scan Radiation Draws Concern

Doctors use X-rays to view internal organs, obtain clear images of possible disease and to treat cancer. For years radiation has been used to save lives, but there is growing concern that some patients are getting more than they ask for when they und

英语灵异故事-Incident in Room 217-01 217房事件 01

[00:13.35]Incident in Room 217 [00:21.51]217房事件 [00:34.25]The incident itself happened to me [00:36.56]the spring semester of 1993 [00:40.00]while I was a student at the University of Wyoming. [00:44.68]At the time I was living in Crane Hall, [00:

新东方背诵文选 L46.Vision by

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 sme

CNN 2012-03-02

It's February 29th and we are ready to leap into today's news headlines.Hi,everyone,I am Carl Azuz,coming to you from CNN news room in Atlanta,Georgia. First up.The race for delegates,in order to win the Republican party's presidential nomination thi

SSS 2008-10-23

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Animals rely on all sorts of cues to find their next meal. Monkeys and birds are attracted to the colors of ripe fruits and berries. And snakes find thei

美国科学60秒 SSS 2013-02-21

Naked skin or effectively naded skin has been the primary interface between the human body and the environment for over 200,000 years. Penn State anthropologist Nina Jablonski on the evolution of human skin pigmentation at the annual meeting of the A

科学美国人60秒 SSS UV Rays Strip Small Galaxies of Star Stuff

UV Rays Strip Small Galaxies of Star Stuff紫外线辐射会阻止小星系形成 The sun spews out ultraviolet radiationthat's why you put on sunscreen. But the sun isn't the only UV-producing celestial body. Stars and supermassive black holes produ

考研背诵50篇——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 of the prim

Humans to Mars Official NASA Goal, But What About Radiation?

Human exploration of Mars is now an official goal of the National Aeronautics and Space Administration (NASA). Last month, U.S. President Donald Trump signed a bill to increase NASAs budget. The law sets spending at $19.5 billion for the 12-month per

英语听力：自然百科 行星旅行指南：木星 Jupiter—5

Halfway there, you bump into the Asteroid Belt. It is not like in the movies where you are dodging asteroids at every second. It is a The space is very big and the asteroids are a long distance apart, so you could travel through it quite safely. The

Health Experts Detail Radiation Symptoms

U.S. health experts monitoring Japan's nuclear crisis are seeking to explain health risks from radiation（放射） exposure, while cautioning that radiation levels measured this week at the Fukushima-Daiichi power plant in northern Japan have not y

VOA慢速英语2010年-SCIENCE IN THE NEWS - Keeping a Lookou

DOUG JOHNSON: This is SCIENCE IN THE NEWS, in VOA Special English. I'm Doug Johnson. FAITH LAPIDUS: And I'm Faith Lapidus. Today, we will tell about skin cancer. (MUSIC) DOUG JOHNSON: Skin cancer is one of the most common forms of cancer. It is also

VOA常速英语2008年-Border Incident Highlights Challenges of Chad,

By Nico Colombant Dakar 06 March 2008 A deadly incident in the border region between Chad and Sudan in which a French soldier was apparently killed is highlighting the challenges of peacekeeping in the refugee-flooded, violence-wracked region. VOA's

英语听力：自然百科 地球力场 Earth's Force Field—19

As the reversal approaches, the decay of our magnetic field will continue and cosmic radiation will get increasingly close to the Earth's surface. As the reversal approaches, the decay of our magnetic field will continue and cosmic radiation will get

WHO Warns Against Self-Medication as Antidote to Radiation

The World Health Organization (WHO) warns against the indiscriminate(任意的无差别的) use of potassium iodide as a precaution against nuclear radiation. WHO is issuing this advisory following reports of people in Japan and elsewhere who are usi

Japanese Radiation Adviser Quits in Rebuke

A key Japanese adviser on radiation（放射 ） leaks at the country's disabled Fukushima nuclear power facility has quit in protest over the government's handling of the disaster. The adviser, Toshiso Kosako, a radiation safety expert at the Univer

food from Japan to be tested for radiation

NEW DELHI, March 16 (Xinhua) -- The Indian government has ordered food originating from（发源于） Japan to be tested for radiation in the wake of explosions at a Japanese nuclear plant following a devastating earthquake-tsunami last Friday, repo

Wifi信号弱？放置地点有问题

Deciding where to place a Wi-Fi router at home to minimise signal blackspots is a fine art. But a physicist has attempted to tackle the problem by mathematically working out the optimum position for a router. He studied how walls and reflections affe

U.S. finds low levels of radiation in milk

WASHINGTON, March 30 (Xinhua) -- A trace amount of radioactive(辐射性的) iodine（碘） has been found in a sample of milk from the west state of Washington, the U.S. Environmental Protection Agency and the Food and Drug Administration (FDA) sai

Firecracker incident not to affect 2018 World Cup: official

Firecracker incident not to affect 2018 World Cup: official