请高手翻译下下面的段落
问题描述：
请高手翻译下下面的段落
The World Trade Center attack in 2001 stands on its own, but two years later was a better indication of how the city’s ability to cope had been transformed from the 1970s.
答
2001年世贸中心袭击事件是一个孤立事件,但是2年后却成为了二十世纪七十年代以来这个城市处理危机能力的改变的一个标志.