The bugaboos in larger versions of this optimistic vision are highly variable flows of material, and decentralized, dilute concentrations of reclaimable stuff.
这乐观观点描述最多,莫过于高变异性物质流动,以及可回收物质密度分散和稀释。
The state shall timely formulate the requirements on the minimum rate of use of the reclaimable materials.