The two primary types of liquid body armor currently in development both start with a foundation of DuPont Kevlar , commonly used in bulletproof vests.是什么意思_The two primary types of liquid body armor currently in development both start with a foundation of DuPont Kevlar , commonly used in bulletproof vests.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句