與其說人均壽命的增長，不如說是嬰兒死亡率的降低。

來源: man008 於 2024-10-13 15:15:10 [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.