In addition, measures are required to permit rapid productexchange.
而且,需要采取措施来实现快速的产品更换。
2
During the Han-Tang period, the roots of the productexchange between the northern nomadic people and the outer world originated deeply from the nomadic society itself.
汉唐时期,北方游牧民族与外界进行产品交换的根源深植于游牧社会自身。
3
What's more, the success of by-productexchange or industrial symbiosis depends on many uncertainties such as concrete technical conditions, market demand and relative scale, etc.