2011年9月28日 星期三

BBC News - World: Bees dip for the sweetest rewards

BBC News - World
The latest stories from the World section of the BBC News web site.
Bees dip for the sweetest rewards
Sep 28th 2011, 08:51

Mathematicians in the US discover why the flowers pollinated by bees have sweeter nectar than those visited by butterflies.

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