单词:positron annihilation radiation
单词:positron annihilation radiation 相关文章
[00:01.10]Ship will self-destruct in T-minus four minutes. 飞船将在T-4分钟后自我毁灭 [00:07.14]Don't you worry about us, Susan. 千万不要担心我们,苏珊 [00:08.22]You finally have a chance to get your old life back. 你终于有机会
[00:03.44]this sandwich is an unmitigated disaster. 这个三明治真是十足的失败 [00:06.24]I asked for turkey and roast beef 我要的是全麦面包 里面夹火鸡 [00:06.56]with lettuce and swiss on whole wheat. 和烤牛肉 还有莴苣和瑞
This is the VOA Special English Agriculture Report. 这里是美国之音慢速英语农业报道。 Japan's nuclear crisis may mean greater demand for imported food and less competition from Japanese products on world markets. But it also means that
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
This is the VOA Special English Health Report. The crisis at the damaged Fukushima Dai-Ichi Nuclear Power Station in northern Japan has raised worries about radiation risks. We spoke Tuesday with Jonathan Links, an expert in radiation health sciences
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
-Sheldon: What are you doing? 你在干什么? -Leonard: I'm packing up all my collectibles and taking them down o the comic book store to sell. pack up: 打包 collectible:收藏品 我在打包我的收藏品...带到楼下的漫画书店去卖掉
-Penny: Okay, first of all, what you call a gap was nearly three feet wide. I slipped And skinned my knee. Are You okay? first of all:首先 gap:缝隙 slip:滑 skin:剥皮 好吧首先呢你所谓的小缝隙有足足3英尺(0.9米)宽我跳过
-Sheldon: This sandwich is an unmitigated disaster. I asked for turkey and roast beef with lettuce and Swiss on whole wheat. unmitigated: 绝对的,十足的 disaster: 灾难 turkey:火鸡 roast:烤肉 ,烘烤 lettuce:莴苣 swiss:瑞士奶
But despite the Mongol's attempts to master siege warfare, the Chinese were still much more advanced in their military technology. They responded by filling bombs with crude oil, molten metal, chemica
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
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
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
Japanese Town Split by Radiation Evacuation Zone It is an extraordinary meeting of the Kawauchi village assembly. Because of severe damage to the village's municipal hall from the earthquake, the public gathering has been convened at a community cent
Japan raised the severity of the Fukushima nuclear crisis from four to five on a seven-point scale of international nuclear events. Fears of radiation exposure has caused a run on salt products all across the region, including in China, where shopper
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
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
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
Public opinion polls suggest most Americans favor full body scanners as a way to protect against terror attacks on commercial airliners. The benefits of scanners are being debated in a number of countries. Some groups have raised privacy issues. But
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