大减收费 slash charges

递减收费率 diminishing rate

杂项调整减收单 MISCELLANEOUS CREDIT VOUCHER

收益递减 diminishing return ; diminishing marginal return ; diminishing of marginal returns

税收自然减收 [税收] natural decrease in tax revenue

减免税收 tax reduction and exemption ; [税收] tax relief

税收减免 tax breaks ; tax concessions ; [税收] tax relief ; tax credit

边际收益递减律 Law of diminishing marginal returns