“通过设计掺杂物的性质，形状和密度，你可以获得一些，在整体性质上，在自然界中不同寻常而且难以得到的东西。”Engheta说。
"By designing the properties of the inclusions, as well as their shapes and density, you achieve in the bulk property something that may be unusual and not readily available in nature," Engheta said.
你无法对它们进行比较——它们基本上是不同性质的东西。
You can't compare them - there is a fundamental difference in kind.
这两个东西外表看起来很像，但性质是不同的。
The two things look alike in appearance, but they are quite different in nature.
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