zero-sum

ze.ro-sum

adj.（形容词）
Of or relating to a situation in which a gain is offset by an equal loss:
零和：得失互抵情形的或与其相关的：
例句：
.. . .under the zero-sum budgeting system that governs federal spending, the money for spinal research is likely to be deducted from some other research account.(Daniel S. Greenburg)
.由于采用零和预算制度控制联邦政府的支出，用于脊椎研究的费用可能会从其它研究预算中扣除.(丹尼尔·S·格林伯格)