短语词组短语incremental payoff 增量收入scientific payoff 科研成果manpower payoff 人力支付payoff expected 支付期望Payoff schedule 融工具各有特性payoff asymmetry 报偿不对称payoff pitch 二击三球后的投球Need Payoff 需求rotary payoff 旋转放线装置payoff function 支付函数 返回 payoff