However, each country still retains its own tariff policy.

但是，每个国家仍然保留自己的关税政策。

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The tariff policy is one of the most important policies in the foreign trade history.

关税历来是外经贸政策中最主要的政策之一。

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The tariff policy is one of the most important policies in the foreign trade history.

关税历来是外经贸政策中最主要的政策之一。

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