This density difference is an index of ocean stratification.

这种水密度差就是海洋分层的标志。

Those individual decisions to drop out collectively amount to society-wide stratification.

那些个决定退总体上等于社会范围的阶层分化。

Stratification has increased 5% in the last 60 years and continues to grow.

过去的 60 年里，分层现象增加了 5%，并仍持续增长。

Large areas of the ocean could also be stuck in layers, like a cake in a process called stratification.

大面积的海洋也可能被分化为数层，就像一个蛋糕一样，这个过程被称为分层现象。

And the Beaufort Sea's stratification is high in both summer and winter.

波弗特海夏冬两季的分层都很活跃。

And global warming encourages stratification because it turns the ice into a layer of fresh water that sits on the surface.

而全球变暖却推动了海水分层，因为变暖会让冰融化成为覆盖着海面的新鲜水层。

He warned that " the original social leveller" , the education system, may now " perpetuate intergenerational class stratification" .

他警告说，“原先的社会平衡器”——教育系统，现反而固化了代际的阶层分化。

The most important reason, though, for thinking that global warming will not produce an Arctic feeding frenzy is that it may increase ocean stratification.

但是，认为全球变暖不会使北极成为巨大“资源”最重要的原因是，它可能会加剧海洋的分层化。