五周年纪念可能是在“归零地”（世贸中心双子大厦变成的一堆废墟）举行的最后一次纪念活动。
The fifth anniversary may be the last one at the Ground Zero site.
让一切归零，一个人也可以简单地快乐。
Let everything back to their original, a person can also enjoy happiness simply.
让一切归零，一个人也可以简单地快乐。
Let everything back to their original, a person can also enjoy happiness simply.
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