The budget will be further strained by the loss of revenue from import tariffs as the free-trade deal comes into effect.
随着自由贸易的实施，未来的预算将会因为进口关税的减少而继续紧缩。
2
Therefore, it is difficult to distinguish between revenue and protective tariffs form economic evidence alone.
因此，但就经济效益而言，很难区分财政关税和保护关税。
3
Yes, and hire car companies are also using revenue management to set their tariffs, because they are also dealing with a "commodity" if you like... so the cost of hiring a car will depend on demand.