efficiency dip效率谷点
efficiencyn.效率;功率
efficiency of government政府效率
efficiency of governance政务效率
efficiency of combustion燃烧效率
efficiency of initiation引发效率
efficiency tracer method效率示踪法
efficiency of conversion变换效率
efficiency of the system系统效率
efficiency in production生产效率
efficiency of investment[经] 投资效率
efficiency of enterprise企业效益