Specific duties are levied at the rate of so much per unit or pound. It means that Taxes are collected by measuring the unit or pound of certain goods.是什么意思_Specific duties are levied at the rate of so much per unit or pound. It means that Taxes are collected by measuring the unit or pound of certain goods.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句