zài / rè / bīng / qì / chū / xiàn / yǐ / qián / rén / men / zhǔ / yào / shǐ / yòng / lěng / bīng / qì / zuò / zhàn

在热兵器出现以前，人们主要使用冷兵器作战。

Before firearms appeared, people mainly used cold weapons in combat.