英语翻译Currently,protective garment materials for protection ag

英语翻译
Currently,protective garment materials for protection against hazardous vapors such as chemical warfare agents (CWAs) and toxic industrial chemicals (TICs) are either dense,completely impermeable polymers (i.e.,cross-linked butyl rubber) or composite membrane systems that rely on an active sorbent such as activated carbon to remove hazardous penetrants.The rst type of protective material quickly generates heat stress in the wearer because evaporative cooling is blocked,and the second type is often bulky,heavy,and has a limited capacity and shelf life.就这句,化学材料文献上的一段,帮我把第一句翻译出来,后面的供参考,如果有兴趣就帮忙把这段都翻译了,