1. The bulletproof vest is made of kevlar, which can effectively protect the police officer from gunshot injuries.
穿甲防弹衣是由Kevlar制成的，可以有效保护警官免受枪击伤害。
2. Kevlar is also widely used in the construction industry for reinforcing concrete structures due to its strong tensile strength.
由于其强大的拉伸强度，Kevlar也被广泛用于建筑行业的混凝土结构加固中。