Shale gas is an important type of unconventional gas resources.

页岩气是重要的非常规天然气资源类型。

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With the world's growing demand for energy, unconventional gas resources and its use arouse more attention.

随着世界各国对能源需求的不断增长，非常规天然气资源及其利用越来越受到重视。

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It thought that unconventional gas resources especially coal gas in China has a vast development prospects.

认为非常规天然气资源尤其是煤层气在中国有广阔的发展前景。

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Some estimates place global unconventional gas resources at about 33, 000 trillion cubic feet, or about five times the amount of proven reserves at the end of 2009.

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