单词：shield coal mining method
单词：shield coal mining method 相关文章
BEIJING, Aug. 24 (Xinhua) -- A spokesman for China's work safety regulator said on Friday that coal mining remains a high-risk industry in the country despite improvements over the past decade. Speaking at a press conference in Beijing, Huang Yi, of
英语新闻
By Malcolm Brown Washington, D.C. 24 July 2007 The future of coal has become a hot topic in the United States. The debate sets concerns about global warming against the desire to reduce America's dependence on foreign energy sources. With the United
2007年VOA标准英语（七月）
AILSA CHANG, HOST: Despite mounting evidence and a stream of dire warnings, federal regulators and mining companies failed to protect coal miners from toxic dust. MARY LOUISE KELLY, HOST: NPR and the PBS series Frontline spent more than a year lookin
2018年NPR美国国家公共电台12月
At the moment, workers at the Pike River Coal mine are using a jet machine to pump CO2 into the mine to put out the fire. Then they will put a cover over the entrance. When the mine is cool and all poisonous gases have gone, rescuers will enter the m
新西兰英语
Voice 1 Hello, Im Joshua Leo. Voice 2 And Im Marina Santee. Welcome to Spotlight. This programme uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 3 The place is dirty
环球英语 Spotlight
Lignite is low grade coal which contains more moisture than high grade coal and is dirty to burn. Southland has ten areas with lignite. Solid Energy, which is a government company, plans to mine this lignite. The company has plans to build a $25m bri
新西兰英语