回帖：Dr. Yan always quotes an ancient saying, " You call your master over the mountains, you master will respond;you call your master across the river, your master realize. A thousand time s you call,a thousand times, you get a respond. Thousand times you try, ten thousand times it work."

严先生一直引用一句常说的话，你寻找老师在山上，你的老师会回应你的，你找你的老师在河边，你的老师将出现，一千次你寻找，一千次你得到回应，一千次的试，一万次的努力，

请大家帮指正，我是一个不好好学习的学生，英语太差了