单词：thyratron control characteristic
单词：thyratron control characteristic 相关文章
Of the more than 80 million children born every year in the developing countrie [00:05.43]and estimated 5 million die [00:08.65]and at least twice as many are disabled by disease which have been largely eliminated in developed nations through immuniz
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Hospital emergency rooms treat injured fingers all the time. Without treatment, a bad cut can lead to permanent damage. But how should a person know when a bleeding cut is serious enough to require medical attention? We asked Dr. Martin Brown, chairm
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Broadcast: Feb 02, 2003 The U.N. Children's Fund units service is starting a weeklong campaign to immunize thousands of Afghan women against tetanus. This is part of a global campaign to eliminate mat
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1. US and Asian officials say it appears that North Korea may be preparing to test its nuclear capabilities again. Secretary of State Condoleezza Rice is planning to spend several days in Asia, shor i
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DEVELOPMENT REPORT – August 12, 2002: Campaign Against Tetanus By Jill Moss (Photo -UNICEF) This is the VOA Special English Development Report. The United Nations Children’s Fund, UNICEF, has laun
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The second type of vaccine contains an attenuated virus. This virus is alive, but has been grown in the lab for several generations, so it isnt able to multiply very well in humans. With the attenuated virus multiplying very slowly, your body is able
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