基本解释[经济学]关税减让率关税优惠率词组短语短语tariff compensatory concession rate [税收]补偿性关税优惠税率;补偿性关税优惠率tariff f concession rate 关税优惠率tariff concession rate更多词组专业释义经济学关税减让率关税优惠率