尝试添加DLTK 3.0存储库，然后再次安装ANTLR，因此Eclipse可以获取插件并能够管理2安装了DLTK版本。

Try to add the DLTK 3.0 repository and then install ANTLR again, so maybe Eclipse can fetch the plugin and be able to manage the 2 versions of DLTK installed.

存储库是：

http://download.eclipse.org/technology/dltk/updates-dev/3.0-stable/