spread F扩展F层spreadv.传播；展开；散布；铺开；伸展；涂撒n.范围；传播；差额；幅度；盛宴spread the word传出消息spread function扩展函数spreading force铺展力spreading crown扩展树冠spreader nozzle喷洒喷嘴spread of spray喷雾范围spread of holes孔的宽展spread a report传播消息spread slanders散布诽谤之词spread recorder扩张记录器