duration

n.持续，持久；期间

dungarees, dungeon, dunghill, dunk, duo, duodecimal, duodenal, duodenum, duologue, dupe, duple time, duplex, duplicate, duplication, duplicator, duplicitous, duplicity, durability, durable, durables, duress, during, dusk, duskiness, dusky, dust, dust bowl, dust devil, dust-cart, dust-cover, dust-jacket, dust-sheet, dust-up, dustbin, duster, dustiness, dustman, dustpan, dusty, Dutch,