The deeply buried volcanics in Songliao basin leads to very low imaging accuracy for underlying formation, which has some negative effect on the structure interpretation.

松辽盆地火山岩埋藏较深，下伏地层成像精度极低，对构造解释造成了一定的影响。

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Severe trauma, or an underlying cancer or infection, could set off an uncontrolled cascade of thrombus formation.

严重的创伤、潜发的癌症或感染，都会引发血栓的大量形成。

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There exists a large-scale transgressive onlap boundary between the Langshan Formation and its underlying strata.

证实郎山组与下伏地层之间存在一大型海侵超覆界面；

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The acquisition will allow Chevron to gain a foothold in the Marcellus shale, a giant rock formation underlying Pennsylvania, New York and other states that has become one of the most prolific sources of natural gas in the U.S. But how much equity value does this really add to the company?

FORBES: Chevron's Natural Gas Push Has Limited Upside For Stock