However, most gum today is made from natural or synthetic polymers, most commonly butyl rubber.

但是，如今的大多数口香糖由天然或人造的聚合物制成，其中最常见的是丁基橡胶。

It contains a natural polymer that includes catechol (KAT-eh-koal).

它包含一种天然聚合物， 包括儿茶酚 (KAT-eh-koal)。

It is made by partially removing a natural polymer called lignin.

它是通过部分去除称为木质素的天然聚合物制成的。

The plan is to develop ways of making anode carbon from lignin, a natural polymer found in the cell walls of plants.

该计划是开发利用木质素制造阳极碳的方法，木质素是一种存在于植物细胞壁中的天然聚合物。

This is a natural polymer that gives wood its stiffness, but it is treated as a waste product when wood is processed into paper.

这是一种天然聚合物， 赋予木材刚度，但在将木材加工成纸张时， 它被视为废品。

The chemical bonds that hold together plastics or vulcanized rubber are immune to most of the digestive enzymes used by bacteria to break down natural polymers and unlike metals, plastics don’t rust or corrode.

将塑料或硫化橡胶结合在一起的化学键不受细菌用来分解天然聚合物的大多数消化酶的影响，而且与金属不同，塑料不会生锈或腐蚀。