输送螺旋止推板

Manfred Bietak was interested in the role played by the Nile in ancient times when he stumbled upon the strange truth about Piramesse. He was trying to trace the lost river beds and waterways of the Nile in order to map out what the Delta would have

发表于:2018-12-05 / 阅读(248) / 评论(0) 分类 遗失的法老城市

ARI SHAPIRO, HOST: The editorial boards of the Miami Herald, Palm Beach Post and South Florida Sun Sentinel are working together to issue a warning with help from WLRN public media. They want people to take the threat of sea level rise seriously. Fre

发表于:2019-01-16 / 阅读(44) / 评论(0) 分类 2018年NPR美国国家公共电台5月

ELISE HU, HOST: The world's oceans are rising up about eight inches on average over the past century. The seas are rising more in some places than others. As NPR's Christopher Joyce reports, scientists are beginning to predict where the rise will be

发表于:2019-01-16 / 阅读(55) / 评论(0) 分类 2017年NPR美国国家公共电台11月

With Mason refusing to survey the mountain, the job fell to Maskelyne. So for four months in the summer of 1774, Maskelyne lived in a tent in a remote Scottish glen and spent his days directing a team of surveyors, who took hundreds of measurements f

发表于:2019-01-29 / 阅读(70) / 评论(0) 分类 万物简史

Speaking on environmental protection, Premier Li Keqiang called improving the environment a battle and listed the major targets for this year. We will fight to win the battle of conserving energy, reducing emissions. and improving the environment, Li

发表于:2019-02-05 / 阅读(89) / 评论(0) 分类 cctv9英语新闻2015年

By Phil Mercer Sydney 09 November 2009 Scientists say that along the coast of Western Australia sea levels are rising at a rate double that of the world average. Statistics from Australia's National Tidal Center show sea levels have increased by 8.6

发表于:2019-02-07 / 阅读(36) / 评论(0) 分类 VOA标准英语2009年(十一月)