柯林斯词典lagging /ˈlæɡɪŋ/ 1. N insulating material wrapped around pipes, boilers, etc, or laid in a roof loft, to prevent loss of heat 防护套 返回 lagging剑桥词典a thick layer of material used to cover pipes , water tanks (= large containers ), and other surfaces in order to stop heat from escaping or water from freezing 保温层，防冻层 返回 lagging