单词：hydraulic rock drill
单词：hydraulic rock drill 相关文章
This is the VOA Special English Economics Report. Many people think the search for cleaner energy leads only to renewable resources like sun, wind and water. But it also leads to a fossil fuel. Natural gas is considered the cleanest of the fossil fu
VOA慢速英语2009年（十）月
美国等国举行地震救灾演习 People around the United States and in dozens of other countries took part last week in an earthquake drill called the Great ShakeOut, an event that teaches them what to do when a real earthquake strikes. 美国等数
VOA双语新闻 2014年10月
What is fracking? It is a way of getting gas or oil from inside rock, deep underground. Mining companies break the rock using water. This week, the Commissioner for the Environment gave a report on fracking in New Zealand. She said that the mining co
新西兰英语
Kenya Moves Full-Steam Ahead on Geothermal Production Kenya is expanding plans to become one of the worlds top geothermal power producers with the start of explorations at a site called Menengai. The government is also aiming to make geothermal Kenya
VOA标准英语2011年(十一月)
'Great ShakeOut' Earthquake Drill Teaches Preparedness 美国等国举行地震救灾演习 LOS ANGELES People around the United States and in dozens of other countries took part last week in an earthquake drill called the Great ShakeOut, an event th
VOA标准英语2014年(十月)
This is SCIENCE FRIDAY. I'm Ira Flatow. Last August, NASA's Curiosity Rover staked its claim in Gale Crater on the surface of Mars, and since then it's been cruising around, zapping rocks, sniffing the Martian air and snapping some self-portraits. Bu
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