单词：open-pit crawler rig
单词：open-pit crawler rig 相关文章
Algae seem harmless enough. These precursors to plants thrive throughout the world's waters. But these single-celled plants have global consequences. We can thank them for oxygen in the atmosphere, oil in the lithosphere as well as dead zones in the
Scientific American(十一)月
AS IT IS 2014-08-10 Increase in Algae Population Infects Waterways 藻类群体的增加污染水道 The American city of Toledo, Ohio faced a serious problem earlier this month. Four hundred thousand people could not drink from the citys public wate
2014年VOA慢速英语(八)月
Afghanistan Continues to Be Hub of Poppy Cultivation 阿富汗仍是罂粟的重要产地 A recent U.S. government report notes that more Afghan land is under poppy cultivation today than it was under the Taliban in 2002. Demand for drugs, especially
VOA标准英语2014年(二月)
By Jeff Swicord Washington, DC 02 August 2006 watch Afghanistan Drug report The North Atlantic Treaty Organization has taken over command of international troops in southern Afghanistan from the U.S.-led coalition. It will now lead the fight against
2006年VOA标准英语（八月）
查尔斯摩尔船长是Algalita海洋研究基金会的创始人，他第一次发现了大太平洋垃圾带一片无边无际漂浮着塑料垃圾的海域。现在，他为我们讲述大海面临的日益严重的塑料碎片污染问题。
TED公开课:环境 重造计划
One of the buildings at Beijing's Palace Museum, or Forbidden City, most closely associated with imperial life is to undergo a major renovation based on traditional construction techniques, the museum announced on Friday. 北京故宫博物院周五宣
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