单词：mn (manganese)
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This is Scientific American's 60-Second Science, I am Cynthia Graber. This'll just take a minute. It might look and even feel like paper, but a new material created by scientists at MIT is designed to be an oil spill super-absorber. This technology d
Scientific American(六)月
This is Scientific American -60 seconds science. Im Cynthia Graber. This will just take a minute. A coal mine can degrade its local environment. But fungus may inadvertently help clean up the mine with its own waste products. Researchers worked with
Scientific American(七)月
This is scientific Americans 60 second science,I'm Cynthia Graber.This will just take a minute.A coal mine can decrease the local environment but a Fungi may indivertantly help cleanup the mine with its own waste products. Researchers worked with the
Scientific American(七)月
By Benjamin Sand Islamabad 14 January 2006 Pakistan says it has lodged a formal protest with the U.S. ambassador in Islamabad, following air strikes that killed 18 people in a tribal area on the Afgha
2006年VOA标准英语（一月）
The African Union has condemned the attempt by military officers in Guinea to seize power following the death of President Lansana Conte. The continent's top peace and security officials are calling the attempted coup a worrisome sign of a reversal
VOA标准英语2008年(十二月)
Here are 7 health problems from eating too many almonds! 以下是吃太多杏仁会导致的7种健康问题！ 1.Kidney Stones 肾结石 Certain diets and foods can make people more prone to kidney stones, especially diets high in oxalates. This is
英语美文