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SSS 2011-05-19

时间:2011-06-04 09:02来源:互联网 提供网友:wanglihong80   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific American’s 60-Second Science. I’m Karen Hopkin. This will just take a minute.

It’s graduation season. And some scientists got to wondering whether the folks who shake hundreds of hands while passing out diplomas run the risk of coming away with a fistful of infectious1 microbes, such as Staphylococcus aureus. Good news—turns out the risk of being passed a disease-causing bacterium2 while pressing the flesh is pretty remote. That’s according to a study in the Journal of School Nursing.

The researchers swabbed the palms of 14 school officials before and after graduation. They found that before the ceremony, and even after a slathering of sanitizer, hands were home to plenty of nonharmful bacteria. On the infectious scorecard, one dean3 brought Staph aureus to a commencement. Two others at a different ceremony walked away with it. And one of those samples came from a left hand, which didn’t participate in any of the meeting-or-greeting. So the math says that of more than 5,000 handshakes, just one may have passed along something less welcome than a sheepskin.

So if you’re graduating this spring, feel free to shake hands, while you wonder if the last person who wore that robe had anything contagious4.

Thanks for the minute. For Scientific American’s 60-Second Science, I’m Karen Hopkin.


点击收听单词发音收听单词发音  

1 infectious I7jx1     
adj.传染的,有传染性的,有感染力的
参考例句:
  • Influenza is an infectious disease.流感是一种传染病。
  • What an infectious laugh she has!她的笑声多么具有感染力啊!
2 bacterium BN7zE     
n.(pl.)bacteria 细菌
参考例句:
  • The bacterium possibly goes in the human body by the mouth.细菌可能通过口进入人体。
  • A bacterium is identified as the cause for his duodenal ulcer.一种细菌被断定为造成他十二指肠溃疡的根源。
3 Dean lmUyu     
n.(大学)院长,系主任,教务长
参考例句:
  • The students much like the new dean.学生们很喜欢这位新系主任。
  • Who is the dean of the Foreign Languages Department?外语系主任是谁?
4 contagious TZ0yl     
adj.传染性的,有感染力的
参考例句:
  • It's a highly contagious infection.这种病极易传染。
  • He's got a contagious laugh.他的笑富有感染力。
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