If necessary, we can use aluminum instead of steel.

如果必要，我们可用铝代替钢。

youdao

Chopsticks can be made of a variety of materials, including bamboo, wood, lacquer, jade, ivory, plastic, aluminum, silver, and gold.

筷子所用的材料的种类则各有不同，所选材料有竹子、木材、漆器、玉石、象牙、塑料、铝、银、以及金。

youdao

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。

youdao