duck-boards

n [pl] boards used to spread one's weight when moving over muddy ground, a weak roof, etc （铺於泥泞地面、 不牢的屋顶...上的）木板（用以分散人体重量）.

dry-walling, drying, dryness, drystone, DSc, DSO, DT, dual, dual carriageway, dual-control, dual-purpose, duality, dub, dubbin, dubiety, dubious, ducal, duchess, duchy, duck, duck-yard, ducking, duckling, ducks and drakes, duckweed, duct, ductile, ductility, ductless gland, dud, dude, dudgeon, duds, due, due to, duel, duellist, duenna, duet, duff,