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          Do sex strikes work?
          

2012-09-05 10:24
          

          

          

          





















          

          

          

          


          New research hopes to speed development of HIV vaccine(視頻)
          

2012-08-30 14:15
          
A team of scientists in the United States has created a new type of mouse that has an immune system similar to that of humans.
          

          

          






          

          

          

          


          Kitchen chemistry: The science of herbs and spices(視頻)
          

2012-08-30 11:08
          
People have been using herbs and spices for thousands of years. Generally, herbs come from the green leaves of plants or vegetables.
          

          

          






























          

          

          






















          

          

          





          

          

          


          


	
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