求翻译：In recent years, however, people have begun to become aware that cities are also areas where there is a concentration of problems.是什么意思？

待解决

悬赏分：1 - 离问题结束还有

In recent years, however, people have begun to become aware that cities are also areas where there is a concentration of problems.

问题补充：

匿名	2013-05-23 12:21:38 然而，近年来，人们已经开始意识到，城市也在地方是有问题的浓度。

匿名	2013-05-23 12:23:18 不过,最近几年,人们开始认识到,城市在某些领域也有一个集中的问题。

匿名	2013-05-23 12:24:58 正在翻译，请等待...

匿名	2013-05-23 12:26:38 近年来，然而，人们已开始意识到城市也是地区有问题的集中的地方。

匿名	2013-05-23 12:28:18 然而，近年来，人们已经开始意识到，城市也在地方是有问题的浓度。

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