这个插件已经存在。

The plug-in already exists.

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如果没有询问您，则说明它已经存在于插件依赖项列表中了。

If you are not asked to add org.eclipse.ui to your dependencies list, it is already a part of your plug-in dependencies list.

youdao

Eclipse 调试器本身是作为 Eclipse 二进制文件中包含的标准插件而存在的。

The Eclipse debugger itself exists as a standard set of plug-ins included within Eclipse.

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