VOA标准英语2008年-Researchers Say Umbilical Cord Blood Is Needed
时间：2019-02-06 作者：英语课 分类：VOA标准英语2008年（五月）
英语课
By Robert Raffaele
Washington
06 May 2008
Washington
06 May 2008
Medical researchers say a simple decision by expectant mothers can mean the difference between life and death for thousands of people. Blood from umbilical cords has been used in life-saving transplants for people suffering from diseases such as leukemia. But cord blood is in short supply. VOA's Robert Raffaele has the story.