Crevasses can form in this upper layers of the glacier.

冰川的上层会形成裂缝。

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The bottom layer has no dependency on the upper layers due to a loose-coupling design.

由于采用松散耦合的设计，下面的层并不依赖于上面的层。

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The sun's upper layers will expand and lose material, and eventually the core will cool enough to become a white.

太阳的上层也将扩大，失去物质重量，最后中心冷却到一定程度就成了白矮星，最终成黑矮星。

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The upper layers of a well-designed securitisation vehicle should be all but impervious to loss.

ECONOMIST: Securitisation

That would have made the Atlantic's upper layers less dense, so less liable to sink.

ECONOMIST: The science

The largest earthquakes in the world occur close to plate margins, areas of the Earth's upper layers that are being rammed together or pulled apart.

BBC: Q&A: UK's small-scale earthquakes