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Scientists at the Massachusetts Institute of Technology (MIT) have created what could be a breakthrough in providing clean, alternative energy. Researchers have invented an artificial leaf that splits water into hydrogen and oxygen and stores the ene
创新英语
Your Eminences, Your Excellencies, Mr. President: On behalf of Mrs. Kennedy, her children, the parents and sisters of Robert Kennedy, I want to express what we feel to those who mourn with us today in this Cathedral and around the world. We loved hi
名人演讲
Artificial Muscle Brings Back Blink A study in the Archives of Facial Plastic Surgery reports the development of an artificial muscle system that could restore the ability to blink to stroke and injury patients. Cynthia Graber reports Most of us blin
60秒科学
By Melinda Smith Washington, DC 01 November 2006 watch Walter Reed Amputees A record number of U.S. soldiers injured in Iraq have lost arms and legs in explosions caused by remote-controlled bombs. The need for more comfortable, adaptable artificial
2006年VOA标准英语（十一月)
Scientists at the Massachusetts Institute of Technology have turned to Mother Nature for inspiration, inventing a device that mimics photosynthesis, the process plants use to convert sunlight and water into usable energy. MIT chemistry professor Dani
VOA标准英语2011年(四月)
Scientists say they have successfully tested artificial blood vessels grown in the laboratory. In a heart bypass operation, surgeons typically remove a vein from a patient's leg and use it to replace blocked arteries that feed the muscles of the hear
VOA标准英语2011年(二月)