NPR美国国家公共电台 NPR 2015-12-16

From NPR news in Washington, I am Jeanie Herbst. Defense Secretory Ash Carter is on his way to the middle east to try to persuade US allies there to put more resources into the fight against Islamic State. NPR's Scott Horsley reports the mission come

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Asian Bacteria Threatens Florida Orange Trees 亚洲细菌威胁到佛罗里达橘子树 Florida's citrus fruit industry is facing a serious threat from a bacteria carried by an Asian insect. The widespread infestation again highlights the danger of

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Computer scientist Shwetak Patel and his team are developing new sensing systems. The initial focus was really around energy and water monitoring.They built a new generation of smart sensors that monitor electronic interference on a homes power line

CNN 2012-05-04

Hello, I am Carl Azuz, welcome you to a new day and a new month, CNN Students, we are gonna take flight with some California teenagers on the beat, but we are beginning today with an anniversary. Tonight, I come forward to the American people and to

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Inflammation - is a whole complex of events which occur in sequence, in response to injury. Tissue damaged by bacteria, chemicals, heat, trauma etc, release histamine and bradykinin and serotonin whic

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Basal lamina - a term used to describe the different layers which make up the basement membrane. These different layers of the basement membrane, the lamina lucida and lamina densa are only visible wi

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NPR美国国家公共电台 2013-03-11

From NPR News in Washington, I'm Korva Coleman. Afghanistan President Hamid Karzai is claiming the United States is working with the Taliban in an effort to keep U.S. troops in Afghanistan. He says the U.S. and militants are scaring Afghans into beli

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亚洲细菌威胁佛州橘树 Florida's citrus fruit industry is facing a serious threat from a bacteria carried by an Asian insect. The widespread infestation again highlights the danger of transferring non-native species to American soil. 佛罗里达

美国科学60秒 SSS 2013-08-05

It's similiar to a pregnancy test: a drop of liquid on a strip of paper causes an easily seen color change. But imagine that kind of simple, cheap technology employed in testing for pollution or health issues anywhere and on the cheap. Researchers at

Keep Fit During the Holidays

We all make resolutions every year to keep fit whether we have diabetes or not. The difference is that as people with diabetes, we need to keep fit, and we know that even if we don't do anything about it. One only has to read the medical abstracts an

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Sugar bowls and hole 孔隙是岩土固体矿物颗粒间的空间。岩土中直径大于1毫米、重力水可于其中自由运动的孔隙，是大孔隙（macro-pore，large pore）。岩土中直径为0.01～1毫米、重力水和毛管水可存其