负效益
Anatomy of the Negative benefit on Agricutural Tax Reform
农业税费改革负面效益剖析
Although vaccination would result in negative benefit in the population aged 7 and over, certain net utility was also gained, Therefore we suggest that the subjects to be vaccinated be extended in due course.
虽然7岁以后接种产生负效益,但由于仍可获得相当可观的净效果,因此建议,在适当时机应扩大疫苗接种对象。
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