How old is “old”?The answer has changed over the years.Two hundred yesrs ago,you were old at 35.At the beginning of the 20th century,the average life span was 45.In 1950,70-year-olds were really old.Today,a healthy 70-year-old is still thought young.
多大岁数才算年老?这个答案已经改变很多年了.两百年前,35岁的时候,你就算老人了.在20世纪初,人的平均寿命是45岁.在1950年,70岁才算真正老.而今天,一个健康的70岁大的人仍然被认为是年轻人.