Tariffs are commonly levied in one of two ways: ad valor em tariff or specific tariff.

关税通常以下列两种方式的一种征收：从价关税或从量关税。

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Should the U. S. roll out specific tariff plans, China would carefully assess them and react accordingly, Gao said.

如果美国推出具体关税计划，中国会仔细评估并做出相应的反应。

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Your fare will be calculated in accordance with our Tariff in effect on the date of payment of your ticket for travel on the specific dates and itinerary shown on the Ticket.

票价将根据您购票之日我们的有效运价计算，该票价适用于您的客票上所载明的特定日期和航程。

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The ATPDEA was enacted by President Bush on August 6th 2002, granting Bolivia , Colombia , Ecuador and Peru preferential tariff treatment for specific products.

CENTERFORSECURITYPOLICY: The Importance of Ratifying Free Trade Agreements

The Tuesday tariff is yet another measure aimed at protecting local industry following sector-specific tax incentives (like the auto industry) and a more aggressive intervention policy to maintain the foreign exchange rate between the U.S. dollar and the Brazilian real at weak levels.

FORBES: Weak Economy Pushes Brazil To Protectionism