单词：spermatospores
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This is scientific American's 60-Second Science, I'm Christopher Intagliata. Got a minute? The yeast Candida albicans ekes out a quiet living in our gut. But its a tough life. It faces acids and enzymes, and the immune system always bullies invaders.
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Guitarist Tom Principato has been a mainstay on the Washington, D.C. blues scene for more than 40 years. Tom's new CD was inspired by family, friends and collaborators who helped shape his life on and off the stage. Like many kids growing up in the 1
VOA标准英语2011年(二月)
The yak has even led the Tibetans to buried treasure. In summer,people can be seen scouring the grassland,bent over in deep concentration.This is the world's weirdest harvest.Tibetans first investigated this strange root-like organism,known locally a
自然百科2010年
By Zulima Palacio Washington 08 May 2008 Although the government and researchers halted most clinical trials for an AIDS vaccine, a research institute in Baltimore continues its work on the most deadly virus of our times. Vaccine trials were stopped
VOA标准英语2008年（五月）
Beijing, Sept. 6 (Xinhua) -- A sperm donation scandal disclosed recently has aroused growing concern in the United States. According to the New York Times' report, Ryan Kramer, the son of a donor, found that he has more than 150 half-siblings - they
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I realize this is not the kind of relationship 我意识到,我们一般不会热衷于 that we usually aspire to have with our food. 与我们的食物建立这样的关系 We want to eat, not be eaten by, our food. 我们吃食物,而不是被食物吃
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