短语词组短語ground -litter 地被物;枯枝層ground indicator litter 枯枝落葉層ground d litter 枯枝落葉層litter the ground 把垃圾扔到地上Litter The Ground With Paper 亂扔紙屑Don 't litter the ground 不要隨地扔紙屑 返回 ground litter