胚胎干细胞是人体内能够转换成任何细胞的基础细胞。日前,美国的科学家们采用克隆技术,在实验室培育出了人类的干细胞。理论上,这些细胞可以转换成任何一种病人需要的组织。比方说,这些基础细胞可以生长成心脏细胞修复心脏疾病,或 Embryonic stem cells are the basic cells in the body that can be converted into any cell. Recently, the scientists in the United States used cloning technology to cultivate human stem cells in the laboratory. In theory, these cells can be transformed into any kind of tissue needed by the patient. For example, these basal cells can grow into heart cells to repair heart disease, or