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诸多线索综合起来为我们描绘出一幅画面：那是火星遥远的过去，那时的火星还有着一层厚厚的大气层，令这颗星球温热暖和，从而使水能够在火星表面流淌。但如今，地表的水消失不见，而
60秒科学
The clues are adding up to give a picture of a distant Martian past, when the planet had a thick atmosphere that was warm enough for water to stream on the surface. But now the waters gone, and the atmosphere is so thin that any water would boil away
Scientific American(十)月
20 布什总统与北约首脑举行会谈 President Bush Meets with NATO Leaders Deborah Tate Brussels 13 Jun 2001 12:19 UTC President Bush is meeting with NATO leaders in Brussels to discuss his ant
VOA2001-国际风云（1）
Russia says it wants legal guarantees from the United States that a proposed missile defense shield for Europe will not threaten Russian security. Deputy Foreign Minister Sergei Ryabkov said Monday that Moscow has been disappointed by Washington's re
英语新闻
A man of the state of Chu had a spear and a shield for sale．Hew as loud in praises of his shield．My shield is so strong that nothing can pierce it through． He also sang praises of his spear．My spear is so sharp that it can pierce through anyt
趣味英语
英国冷艳新女声：Clare Maguire - The Shield And The Sword Clare Maguire，英国新女声，也是2011年度英国最有前途新人评选第五名，今年2月她发行了首张个人专辑。Clare的声音有种冷艳的特质在里面，非常
经典英文歌曲