关于jwt-auth的jwt.auth与jwt.refresh的不理解

      $api->group(['middleware' => 'jwt.auth'], function($api){
                $api->get('lessons', 'LessonsController@index');            
                $api->get('lessons/{id}', 'LessonsController@show');//        
        });        

      $api->group(['middleware' => 'jwt.refresh'], function($api){
           $api->get('user/me', 'AuthController@getAuthenticatedUser');          
           $api->get('lessons', 'LessonsController@index');           
           $api->get('lessons/{id}', 'LessonsController@show');        
      });<br></br>

这两个路由都可以访问？我该用那一个，还有就是token过期后是怎么刷新的？