Metals such as aluminum can also form foams -- and because of their greater rigidity, they could, in theory, dissipate as much energy as a polymer foam in a much thinner layer.

金属，如铝，也可以制备成泡沫材料。 由于金属更高的刚度，理论上，更薄金属泡沫就可以吸收聚苯乙烯泡沫所能吸收的能量。

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The chances for a total meltdown at the pole are higher than ever because the layer of ice coating the sea is thinner than ever, he said.

北极全面融冰的机会要高于往年，这是因为覆盖海洋冰层的厚度比以前薄了，他说。

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This synaptic pruning, as it is called, causes the brain's cortex-the outer layer of gray matter where we do much of our conscious and complicated thinking-to become thinner but more efficient.

我们称之为突触的自我修剪，保持意识清醒和用来复杂思维的大脑皮层，外面的灰质外层变得更薄但更高效。

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The researchers found that the rodents' preferences varied slightly between strains, as well as between sexes (with females partial to higher temperatures, possibly because of their thinner protective layer of fat), confirming that there is no single set of conditions in which all mice feel cosy.

ECONOMIST: ��and they may return the favour

The display screen for the iPhone 5 could reduce a layer of glass if the metallic layer for the touch screen is applied to the protective glass, and the result would be a thinner screen.

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