陨坑内部似乎显露出两种不同类型的基岩，即外缘的浅色岩石和内沿的深色岩石。

The crater seems to have exposed two different types of bedrock, the light-toned rock toward the outer edge and the darker rock on the inner edge.

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在这样一个位于（太阳系可居住区）外缘的星球上，才能保有生命之水，才能维持栖息地。

On a planet like that, on the outer edge, you will have reservoirs of life, and there will be habitats that will persist.

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目的：探讨腰椎上关节突外缘的形态特点及其与椎弓根中心的关系。

Objective: To study the quantitative relationship between the lateral margin of the superior facet and the pedicle center of lumbar vertebrae.

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So the distance of the gap needs to be between the outer limits of boredom and overstrain according to Iser.

因此，据伊瑟尔说，间隙的大小应该,以无聊与过劳作为外缘界限，处于两者之中。

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