信息: information; message; news效用: effectiveness; efficacy; eff ...信息效率: information efficiency信息效益: efficiency brought about by information; information profitability信息效劳主管: director of information services效用: effectiveness; efficacy; efficiency; utility; usefulness; avail 边际效用 [经济] marginal utility 喘息效应: breathing effect窒息效应: smothering effect反效用: disutility; negative utility负效用: disutility; negative utility功用,效用: the quality or condition of being useful; usefulness净效用: net utility利用,效用: utilization效用,效果: effectiveness效用,有用: utility noun效用感: sense of efficacy效用机: utility aircraft效用论: theory of utility效用面: utility surface效用值: utility value; value of utility总效用: cumulative utility; total utility减少效用, 失去效用: disutility【化学】工业效用。: commercial availability比较效用: comparative utility边际负效用: marginal disutility