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SSS 2011-11-07

时间:2011-12-02 05:52来源:互联网 提供网友:gmeng   字体: [ ]
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    (单词翻译:双击或拖选)
The early bird gets the worm, and may avoid skin cancer. Because a new mouse study suggests that for humans, tanning in the mornings may be less likely to permanently1 damage in DNA2 and cause skin cancer. A mouse’s levels of the DNA repair protein XPA are different from ours. They peaked in the morning and bottom out in the evening. Researchers expose mice to UV radiation when their XPA was at their minimum level, around 4 a.m., and other to the same rays around 4 p.m. when XPA levels peaked. Mice who tanned while low on their repair protein develop skin cancer faster and 5 times more frequently than their evening tanning counterparts. The studies in the Proceeding3 of the National Academy of Sciences. Unlike mice, humans are nocturnal, so their XPA level raise and fall at different times. In people, XPA at prime DNA repairing levels in the morning, which does look like the safest time for UV exposure. So if you want to avoid skin cancer, probably go to the tanning’s long early, or better yet, don’t go at all

 


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1 permanently KluzuU     
adv.永恒地,永久地,固定不变地
参考例句:
  • The accident left him permanently scarred.那次事故给他留下了永久的伤疤。
  • The ship is now permanently moored on the Thames in London.该船现在永久地停泊在伦敦泰晤士河边。
2 DNA 4u3z1l     
(缩)deoxyribonucleic acid 脱氧核糖核酸
参考例句:
  • DNA is stored in the nucleus of a cell.脱氧核糖核酸储存于细胞的细胞核里。
  • Gene mutations are alterations in the DNA code.基因突变是指DNA密码的改变。
3 proceeding Vktzvu     
n.行动,进行,(pl.)会议录,学报
参考例句:
  • This train is now proceeding from Paris to London.这次列车从巴黎开往伦敦。
  • The work is proceeding briskly.工作很有生气地进展着。
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