单词：
单词： 相关文章
Why does Florida have so many springs? Florida sits on a layer of porous limestone which acts as an underground reservoir or aquifer. This aquifer can absorb huge amounts of water. Where the pressure is great enough, springs bubble up, spewing up bil
自然百科2009年
By David McAlary Washington 15 February 2007 A U.S. spacecraft has provided fresh evidence that water once flowed on Mars. In this case, it is water that ran deep underground through rock fissures, places where scientists say life could have thrived
2007年VOA标准英语（二月）
From the entrance, this is nothing like a commercial cave. 从洞口看，这绝不像个商业旅游的山洞。 You're looking at Camp Two in a place called J2, not K2, but J2. 你看到的是二号营地，它搭在J2,不是K2(世界第二高峰）
TED演讲商业篇
JINAN, Feb. 17 (Xinhua) -- A municipal government in east China's Shandong Province has offered a huge reward for clues or evidence of local enterprises pumping emissions underground. The government of Weifang City has offered a 100,000 yuan (15,873
英语新闻
Chinese social activist is accusing Weifang City factories of illegally discharging chemical waste into 1,000 meter deep wells. In response, the Shandong provincial environment protection department has sent 320 officers to over 700 suspected factori
英闻天下
China's State of the Environment Report for 2012 suggests that the overall quality of China's environment is balanced and stable. The condition of underground water remains to be a big concern. Li Dong has the details. Released annually by China's Mi
世界各地新闻集锦