As for valuable goods shipped by sea, the shipping company will charge an AD valorem rate.

如ꛥ果货物价值较高，运输公司则收取从价运费。

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The tax may be levied as a percentage of the value of the imports, which is called an AD valorem tariff.

税费可以按照进口商品价值的一定的百分比来征收，这称为从价关税。

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Then there's a 54-cent tariff (not including a 2.5% ad valorem levy) to keep cheaper Brazilian ethanol out of the country.

FORBES: Field of Dreamers

FSCs or as simple as ad valorem payments, their perpetuation relies on the interests of industries whose scope and lifetime they have extended.

ECONOMIST: Economics focus

Rich countries' subsidies are more complicated than simple ad valorem payments.

ECONOMIST: Economics focus