It's made of synthetic rubber, which is a type of plastic.

它是由橡胶制的，它是一种塑料。

JSR started out by specialising in synthetic rubber.

JSR 最初专注橡胶。

Although some gums today still use plants, most recipes today now use synthetic rubber mixed with sugar and other flavorings.

尽管今天有些口在使用植物，但如今大多数都使用的是橡胶与和其他调味料混而。

They're made with a combination of proprietary synthetic rubber compounds, which are paired with aluminum steel reinforcements and nylon and aramid fabrics.

它们是由专用橡胶化物与铝钢增强材料以及尼龙和芳纶织物组而的。