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Spreading boards扬料板spread of effect效果扩散Spreading source传播来源spread of rumors散播谣言Spread parameter传播参数spread the wings张翅膀儿spread in energy能量离散spread butter on在 ... 上涂黄油spread of points点的散布spreading medium传媒