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As you've probably experienced firsthand, some mosquito species have a real taste for warm, human blood. So much so that if you raise them on it the lab, they'll accept no substitute. Fortunately, I don't get major reactions at all. Brad Main is a mo
2016年Scientific American(九)月
When Presidents, royalty or celebrities visit Singapore, they often receive a specially grown orchid, the national flower of the city-state, named after them. Barack and Michelle Obama, Chinese President Xi Jinping and Nelson Mandela all have multi-c
2018年VOA慢速英语(六)月
ROME, Dec. 3 (Xinhua) -- Italy lacks the necessary energy(能量,活力) and strength for an economic revival while unemployment and poverty are on the rise, warned a report issued Friday. The 44th edition of the Censis think tank social survey, the
英语新闻
In Africa's battle against malaria, two low-tech tacticsinsecticides and bed netshave done a decent job killing off mosquitoes. But it's mainly one species that's been affected. That's a species called Anopheles gambiae, sometimes called the African
2016年Scientific American(八)月
By Brian Wagner Miami, Florida 18 February 2008 Orchid growers are trying to grab a bigger share of the global trade in flowers, which accounts for several billion dollars each year. Growers from Latin America and Asia are scrambling to market unique
VOA常速英语2008年（二月）
You might not think there would be that many people in the world prepared to devote lifetimes to the study of something so inescapably low key, 你或许会认为，世界上不会有多少人愿意花毕生的心血来研究那个不起眼儿的东西
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