Translate the following passage into Chinese . According to a recent report, life expectancy in the United States is the longest ever, approaching 79 years. This was highlighted in the recent Time cover story, “ This Baby Could Live to Be 142 Years Old. ” With very few exceptions — such as the flu pandemic of 1918, which caused the life expectancy to temporarily plummet by a dozen years — our life expectancy has continue d with a positive trend line throughout our nation ’ s history. Now, as life expectancy approaches 79, the full retirement age for Social Security has increased from 65 in 1960 to 67. Hence, on average, it will now be necessary for Social Security benefits to fund 12 years of retirement .