It is not through drugs that they have improved the general health, cleaned up plague spots, cut down infant mortality, lengthened the average life expectancy of mankind by fifteen years.

• 医学并不是通过药品来改善大众的健康状况、阻止瘟疫传播、降低婴儿出生死亡率、延长15年的人类平均寿命期望值。）