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SSS 2008-05-05

This is Scientific American's 60-Second Science, Im Steve Mirsky. Got a minute? Biologists often attempt to construct a genealogy that shows the relationships of all life on earth. One well-accepted effort compares the nucleic acid sequences that cod

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VOA慢速英语20060821a

DEVELOPMENT REPORT - Cooking Meals With the Sun for FuelBy Jill Moss Broadcast: Monday, August 21, 2006 I'm Gwen Outen with the VOA Special English Development Report. Millions of people around the wo

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a flat percentage rate of income 统一比率的所得税税率 a long position 多头部位，利多形势 a long position 多头寸；买进的期货合同 a put option on a debt security 债务证券的卖出版权 a sales slip 签购单据，售货

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In 1969, in an attempt to bring some order to the growing inadequacies of classification, 1969年，为了整理一下越来越显得不足的分类法， an ecologist from Cornell University named R. H. Whittaker unveiled in the journal Science a pr