VOA News 조회 수 33 추천 수 0 2015.02.27 05:14:20
Falling oil prices are helping consumers purchase cheaper petroleum at the pump. But that's made hydraulic fracturing or “fracking” less economically viable for the companies in the...
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원문출처 : http://www.youtube.com/watch?v=ZTNuddYq3OA&feature=youtube_gdata