求翻译：排污权交易是指在一定区域内,在污染物排放总量不超过允许排放量的前提下,内部各污染源之间通过货币交换的方式相互调剂排污量。是什么意思？

Emissions trading is in a certain area, the total amount of pollutant emissions do not exceed the allowable emissions under the premise of internal sources of pollution by way of currency exchange between mutually adjust the volume of sewage.

Emissions trading is in a certain area, the total discharge of pollutants is not exceeded the allowed emissions within the premise, the source of the contamination by currency exchange between the mutual swap emissions.

The pollution discharge power transaction is refers in certain region, does not surpass the permission withdrawal in the pollutant emissions total quantity under the premise, between the internal various sources of pollution through the way which exchanges through money fills a prescription mutually

CAP and trade is within a certain area, on the premise of pollutant emissions do not exceed the allowed emissions, by way of currency exchange transfers between the various sources of emissions.

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