熔丝隔离开关

SSS 2009-01-02

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Mosquitoes carry nasty diseasesdengue fever, west nile, malaria. But the microbes that cause those diseases dont attach themselves to the mosquitoes an

发表于:2019-01-08 / 阅读(81) / 评论(0)

Scientific American(一)月

2006年VOA标准英语-More Bed Nets Needed in Burundi's Fight Ag

By Cathy Majtenyi Bujumbura 24 April 2006 Every 30 seconds a child in Africa dies of malaria. Health care workers report a drop in malaria rates with bed net use, but in the tiny central African natio

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2006年VOA标准英语（四月）

狗狗的鼻子为什么总是湿的？

Why are dogs'noses so wet? 狗狗的鼻子为什么总是湿的？ Humans and dogs share a special relationship, moulded over millennia of reciprocal love and companionship. 数千年来，人类和狗狗都有十分特殊的关系，相互喜爱，相

发表于:2019-02-01 / 阅读(342) / 评论(0)

阅读空间

Hoglands

BBC Learning English People and Places Hoglands Amber:Hello, Im Amber and youre listening to bbclearningenglish.com In People and Places today, we meet Mary Moore, daughter of the renowned British artist and sculptor, Henry Moore (who died in 1986).

发表于:2019-02-04 / 阅读(151) / 评论(0)

人与地方

TED演讲:出身决定命运?(2)

Another example: 还有一个例子 a few years ago I got a call from a man who was 19 years old, 几年前，我接到一个十九岁的男孩打来的电话 who was born a boy, raised a boy, 他生下来是个男孩，也被当作男孩来养 had a

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TED演讲教育篇

英语美文：人生如诗

I think that, from a biological standpoint, human life almost reads like a poem. It has its own rhythm and beat, its internal cycles of growth and decay. It begins with innocent childhood, followed by awkward adolescence trying awkwardly to adapt its

发表于:2019-02-20 / 阅读(51) / 评论(0)

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