结果我只是忘记了在.vim-mode:not(.insert-mode)选择器之前添加atom-text-editor选择器.将脚本更改为以下内容，并且可以正常工作:

Turns out I simply forgot to add the atom-text-editor selector before the .vim-mode:not(.insert-mode) selector. Changed the script to the following and it worked:

'body atom-text-editor.vim-mode:not(.insert-mode)':
  ', b n': 'pane:show-next-item'
  ', b p': 'pane:show-previous-item'