我之前装了lion gm 以及 xcode 4.2 beta for lion。
现在我下载xcode4.1 for lion，是否只要直接覆盖安装就可以了？或者还需要卸载之类的操作？
现在我下载xcode4.1 for lion，是否只要直接覆盖安装就可以了？或者还需要卸载之类的操作？
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