Criminals beware! Carbon Motors' purpose-built E-7 police car could be an officer's dream come true. What weve developed is a homeland security platform of technologies. The amount of equipment and technology in this vehicle not only provides them th

发表于:2018-12-11 / 阅读(32) / 评论(0) 分类 万花筒2009年

President Obama says Afghanistan is ready to move from a decade of war to a period of peace and development. NPR Scott Horsley reports Mr. Obama is hosting a NATO summit in Chicago on Afghanistans postwar future. President Obama says there is still a

发表于:2018-12-17 / 阅读(46) / 评论(0) 分类 2012年NPR美国国家公共电台5月

Sometimes women and men break a nail working on a tough task. Because our keratin claws are no match for the club-like appendages of a critter called the peacock mantis shrimp. They can hammer through crab exoskeletons and even mollusk shells to find

发表于:2019-01-08 / 阅读(65) / 评论(0) 分类 Scientific American(六)月

3D Now(3D no waiting) ALU(Arithmetic Logic Unit,算术逻辑单元) AGU(Address Generation Units,地址生成单元) BGA(Ball Grid Array,球状矩阵排列) BHT(Branch Predicti

发表于:2019-01-09 / 阅读(242) / 评论(0) 分类 实用英语

beneath 在美国当代英语语料库统计的20000个常用词中,beneath作为动词的用法排在第1991位, 词义解析: 介词:在下方;到下方 John hid himself beneath the bed. 约翰藏在床底下。 be beneath sb 对来说不够好

发表于:2019-01-11 / 阅读(275) / 评论(0) 分类 英文语法词汇

Science and technology 科学技术 Low-cost radar 低成本雷达 A programme worth watching 值得一看的节目 How air-traffic control can use television signals to plot aircraft 空中交通管制局如何利用电视信号找出飞行器位置?

发表于:2019-02-05 / 阅读(38) / 评论(0) 分类 经济学人科技系列