The best physicians are Dr. Diet, Dr. Quiet,and Dr. Merryman.
节食博士,静心博士,欢喜博士,三者都是最好的医师;饮食少,休息好,快乐多是却病延年之方。
Thus one simple fact, a change in the number of bison, had an effect on the whole wildlife chain of the plains.
因此,出现了这样一个简单的事实--野牛数目换的变化对平原的整个野生生物链都产生了影响。