medium of circulation

基本解释

The medium of circulation for market supplies the mass means to the social development of cognition.
市场流通手段为认识的社会性发展提供了社会媒介；
Farmland soil is an important medium of the ecological circulation of cadmium, which does harm to human health that cannot be neglected.
农田土壤是镉生态循环的重要介质，所含镉对人体健康的危害不可忽视。
Circulation medium of agricultural products, which connects the production with the consumption, is of increasing importance in the agriculture.
农产品流通中介关系到农产品生产和消费的顺利实现，在农产品问题中地位日渐突出。