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This is the VOA Special English Agriculture Report. Farmers and gardeners have turned the soil for centuries. But many now believe in no-till or reduced tillage, a method also called conservation tillage. The Conservation Technology Information Cente
aries (mar. 21- april 20) the robust ram puts their athletic and energetic energy to use in activities like sprinting, high impact aerobics or tae-bo. 精力充沛的白羊喜欢短跑、高冲击性有氧运动和跆搏健身操等运动。 ta
By Mike O'Sullivan Los Angeles 10 January 2008 Success in Hollywood comes by way of many different routes. For actor Christian Clemenson, the road started in a small-town in the Midwestern state of Iowa and has led to a role on a television series ca
Graphene Called Amazing, Versatile Material of the Future 前景光明的多功能材料石墨烯 In 2004, two scientists at the University of Manchester in England isolated a carbon-based material called graphene, with some unusual properties. Andre
PC:个人计算机Personal Computer CPU:中央处理器Central Processing Unit CPU Fan:中央处理器的散热器(Fan) MB:主机板MotherBoard RAM:内存Random Access Memory,以PC-代号划分规格,如PC-133,PC-1066,PC-2700 HDD:硬