那就较个真

来源: 于 2024-12-16 00:33:01 [旧帖] [给我悄悄话] 本文已被阅读：次

According to historical analyses, the average life expectancy at birth in the U.S. around 1800 was approximately 43 years. If the child survived the age of ten, this person could live to his 60s.