Thanks to new drilling technology, and in particular a controversial process called hydraulic fracturing or "fracking," the size of the proven reserves is growing.

随着钻井技术，特别是充满争议的水力压裂法(又称破裂法)的广泛采用。已探明的天然气储量不断增加。

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Thanks to new drilling technology, and in particular a controversial process called hydraulic fracturing or "fracking," the size of the proven reserves is growing.

随着钻井技术，特别是充满争议的水力压裂法(又称破裂法)的广泛采用。已探明的天然气储量不断增加。

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