保护性关税是设立一税负非常高的关税壁垒以有效的消除与本国企业的竞争，或是消除被廉价竞争性进口货摧毁的危险。
保护性关税使英国工业免受国际竞争影响。
British industry was sheltered from foreign competition by protective tariffs.
因此，很难只从经济迹象来区分财政性关税和保护性关税。
Therefore, it is difficult to distinguish between revenue and protective tariffs from economic evidence alone.
财政性关税总会提供一些保护，而保护性关税也会产生一些收入。
A revenue tariff will always provide some protection, and a protective tariff will produce some revenue.
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