原来步骤和命令：
克隆或下载你想要的教学包到工作空间的/src目录下，例如 ~/catkin_ws/src
cd ~/catkin_ws/src
git clone https://github.com/xxxxxx.git
安装教学包所需的依赖
cd ~/catkin_ws
rosdep install --from-paths src --ignore-src --rosdistro=kinetic -y
在使用rosdep install --from-paths src --ignore-src --rosdistro=kinetic -y
命令安装依赖的时候出现了，如下错误：
ERROR: the following packages/stacks could not have their rosdep keys resolved
to system dependencies:
rbx1_speech: Cannot locate rosdep definition for [pocketsphinx]
解决：
把：rosdep install --from-paths src --ignore-src --rosdistro=kinetic -y
改成：rosdep install --from-paths ~/catkin_ws/src/xxxxxxxx --ignore-src -r
最后你发现#All required rosdeps installed successfully的提示，成功解决