Dispersal is the spreading of things over a wide area.
Plants have different mechanisms of dispersal for their spores.
植物传播孢子的方法各不相同。
dispersal of ash during the hurricane season.
飓风季节内灰尘的飘散。
The dispersal of a crowd involves splitting it up and making the people leave in different directions.
The police ordered the dispersal of the crowds gathered around the building.
警察命令大楼周围聚集的人群散开。