And an amazing fact for techno-optimists is that in the first half of the 20th century, the rate of improvement of life expectancy was three times faster than it was in the second half of the 19th century.
기술 낙관론자들에게 놀라운 사실은 20세기의 전반부에는 기대 수명의 개선율이 이전 19세기 후반보다 세 배나 더 빠르게 성장했습니다.