effective at在 ... 效率高effectiveadj.有效的；生效的；实际的effective scanning有效扫描effective coverage有效区域,可达范围Effective Transfer有效转移effective response有效的反应effective guidance实效性指导effective lifetime有效寿命effective salinity有效盐度,有效含盐量effective fraction有效部位effective tax plan有效税收筹划effective alliance有效联合