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想问下大家，ubuntu16上安装了ros，里面可以使用srvc_tools工具箱，后面换到Ubuntu18就没法使用了 报错如下： ERROR: the following packages/stacks could not have their rosdep keys resolved to system dependencies: srv_tools: Cannot locate rosdep definition for [plot_tools] 我怀疑是包被废弃了，有没有替代的呀