1. Stem  cells have qualities that may make them highly useful in the treatment of  many diseases. The stem cells from embryos are the most useful. They are able  to develop into all the kinds of tissues of the body.

2. The  great value of embryonic stem cells appears to be their ability to reproduce  in large numbers in the laboratory before they become specialized cells.

3. These stem cells can be used to treat diseases of the brain, heart,  liver, pancreas and kidneys. These include diabetes, Parkinson’s disease and  Alzheimer’s disease.

4. Many  scientists and some lawmakers believe there should be no limits placed on  stem cell research. Yet stem cell research presents special problems.

5. The  debate over embryonic stem cell research is complex and will continue for  some time. However, experts say no solution can be reached easily because  this research involves morality as well as medicine.

干细胞所具有的品质使它们在许多疾病的治疗中非常有用。从胚胎中取得的干细胞是最有用的。他们能够发展成身体的各种组织。

胚胎干细胞的大的价值似乎在于它们有能力在实验室中大量繁殖，然后成为专门的细胞。

这些干细胞可以用来治疗脑、心脏、肝脏、胰腺和肾脏疾病，还包括治疗糖尿病，帕金森病和阿尔茨海默病。

许多科学家和一些立法者认为不应该限制干细胞研究。然而，干细胞研究带来一些特殊的问题。

在胚胎干细胞研究上的争论是复杂的，会持续一段时间。然而，专家说争论不会很容易解决，因为干细胞研究涉及医学以及道德问题。