Whithout training, lacking of supervision, gloomily maintaining, some people playing sly, it is inevitable?
Whithout training, lacking of supervision, gloomily maintaining, some people playing sly, it is inevitable?
没有培训、缺少监管、艰难维持，一些人耍猾，如何避免？
Whithout training, lacking of supervision, gloomily maintaining, some people playing sly, it is inevitable?
没有培训、缺少监管、艰难维持，一些人耍猾，如何避免？