The bugaboos in larger versions of this optimistic vision are highly variable flows of material, and decentralized, dilute concentrations of reclaimable stuff. 这个乐观观点的描述最多的,莫过于高变异性的物质流动,以及可回收物质密度的分散和稀释。
One of OPEC's biggest bugaboos is losing control of prices to hedge funds and other speculators that they view collectively as upstarts. 欧佩克最感头痛的一个问题是,油价控制权正在被冲基金和其他投机商夺走。