被“机遇”发现的分层堆积的特征一般解释为来自水的沉淀，在地球上也常见。

The layered features found by Opportunity, interpreted as sedimentation from water, are also seen on Earth.

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达成的共识是我们需要一个单独的、已定义的、可扩展的框架，在此基础上能将所有这些分层堆积到服务描述堆栈中。

The consensus was that we needed a single, defined, extensible framework upon which to layer each of these into the Service Description Stack.

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还有一些已经被当做“社会分层”被堆积在其他产品之上。

Others have emerged as "social layers" atop other products.

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