详细解释:n. 迟钝, 落后, 防护套
a. 迟钝的, 落后的
【化】 隔热层
【医】 迟滞, 后曳
【经】 (交货)缓慢, 迟延
英语解释：
名词 lagging:
used to wrap around pipes or boilers or laid in attics to prevent loss of heat动词 lag:
hang (back) or fall (behind) in movement, progress, development, etc.同义词：lag, dawdle, fall back, fall behind