Tehsteppedoffatraini的精选

问题详情：Inthewinterof1910,Dr.WuLien-TehsteppedoffatraininthenorthernChinesecityofHarbin.Hewastheretosolveamedicalmystery,atgreatpersonalrisk.Overthepastfewmonths,anunknowndiseasehadsweptalongtherailwa...