Deaths in jobs related to oil and gas extraction jumped from 72 victims in 2002 to 125 in 2006, a 70 percent increase.

石气开采相关工作岗位死亡人数由2002年的72人增加到了2006年的125人，增幅多大70%。

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Mining of copper, cobalt, diamonds, gold, zinc and other metals, as well as petroleum extraction, once accounted for 75 percent of its GDP.

铜、钴、钻石、黄金、锌和其它资源的开采，以及石油开采，曾经占其GDP的75%。

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Liquid-Liquid Extraction (LLE) is a kind of tradition sample pretreatment method. There are 70 percent of documents which adopt Liquid-Liquid Extraction as a way of sample pretreatment.

液-液萃取(LLE)是一种传统的样品前处理技术，报道目前有70%的有关文献采用液-液萃取作为样品前处理方式。

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Natural gas extraction from shale deposits currently accounts for around 34 percent of the total U.S. output.

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