One or more key marker beds were identified for the purpose of leasing and drilling.

为了租地和钻井的需求，他们对比了一个或更多的关键标志层。

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It's a key marker for the cluster of risk factors known as metabolic syndrome, and it sharply increases the risk of heart disease and diabetes.

腹型肥胖是代谢综合征一系列危险因素的关键标记，它大大增加了患心脏病和糖尿病的风险。

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The drowning event is a key marker representing the termination of carbonate platform development and has some features of geology, geochemistry and seismic reflection.

沉没事件是碳酸盐岩台地发育、演化终止的一个重要标志，它具有特定的地质、地球化学及地震反射特征。

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When we interact with people offline, our physical presence is the key marker of our identity.

FORBES: Inviting Google to the Wedding: Your Online Name Change

For Abdullah one key marker is social media.

BBC: Why social media - not violence - could bring change to Oman

And only 21% of black Americans have a suppressed viral load, the key health marker for HIV treatment.

WHITEHOUSE: Addressing HIV in the Black Community