C-h k S-SPC：
SPC (translated from S-SPC) runs the command self-insert-command (found in global-map), which is an interactive built-in function in ‘C source code’.
Emacs似乎直接吧S-SPC转化为SPC了，有没有可能直接绑定S-SPC？
更新：是我general没设置好
當然可以了
