Permits are transferable and may be bought or sold.
许可是可以转让的并且也可以买或是卖。
2
Transferable emission permit — a pollution control policy requiring each emitter of a pollutant to possess permits for the amount of pollution it releases.
可转让许可系统——污染物控制政策要求每个污染排放源拥有污染排放许可。
3
Emission permit system — a type of transferable permit system in which the permits are defined in terms of the right to emit a stipulated amount of emissions.