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。
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.
结果表明，利用天然蜘蛛丝为模板通过化学镀的方法可以制备出具有极大长径比的金属微管。
The results show that the metal micro-tubes can be prepared by electroless plating using spider silk templates.
可以制备深凹肩台或者直角肩台。
Gingival margins can be prepared with a deep chamfer or a shoulder.
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