Abstract: Any kinds of random motion of particulates (gas molecules, Brownian particles, etc.)can make them suspended in gravity field in spite of there are external forces or not. Suspension ofthe solid particles in rivers and in pipes of pneumatic (or hydraulic) transport is also supported bythe random motion of themselves. The lift and other forces acting on particles can really changethe vertical distribution of the particles, but they can not make the particles dispersedly suspendedif there are no random motion....