1964. America had small families and long life; Vietnam had large families and short lives. And this is what happens: the data during the war indicate that even with all the death, there was an improvement of life expectancy.
1964年的美国家庭小寿命长 越南的家庭大而寿命短。这是后来的变化 越战时期的数据显示，尽管战争造成伤亡 越南人的平均寿命仍有提高