Therefore, many countries are not so resolute and thorough in banning human embryo cloning.
因此，在禁止使用克隆人类胚胎方面，世界各国的态度并不坚决而彻底。
But they are difficult to make and require the use of an embryo or cloning technology.
但是制造他们是很困难的，而且需要使用胚胎或者是克隆技术。
Influences of embryo quality and type differentiation stayer media passage and digestion fluid on embryonic cell separation and cloning were discussed respectively.
本文就胚胎质量和胚胎类型分化抑制物培养基传代时间和消化液等方面对胚胎干细胞分离克隆的影响进行了讨论。
Scientists in the United States say they've created a human embryo through cloning.
美国科学家称通过克隆技术创造了人类胚胎。
But is it really the first time? Is cloning all that different from genetical ly engineering an embryo to eliminate a genetic disease like cystic fibrosis?
但这真的是第一次吗？克隆与改造胚胎的基因以消除象囊性纤维变性这样的基因疾病真的是有天壤之别吗？
Abnormally large progeny have resulted in animal cloning done to date, which suggests that there are serious risks to the health of the mother and any potential embryo.
还有一点需要指出的是，目前对动物进行的克隆已产生形体异常硕大的后代。这意味着母亲和任何潜在的胚胎的健康都将面临严重的威胁。
The paper mainly reviewed several factors on influencing somatic cloning of pigs, which involve in cytoplast recipients, donor cells, micromanipulation, activation and reconstituted embryo transfer.
因此本文主要综述了影响体细胞克隆猪的几个因素，涉及胞质受体、供核细胞、显微操作、激活以及重组胚移植。
Faulty epigenetic reprogramming in cloned embryo leads to irregularities in gene expression that might result in the abnormal phenotypes in cloning.
异常的表观重编程可以导致异常的基因表达，从而引起克隆动物的诸多异常表型。
Faulty epigenetic reprogramming in cloned embryo leads to irregularities in gene expression that might result in the abnormal phenotypes in cloning.
异常的表观重编程可以导致异常的基因表达，从而引起克隆动物的诸多异常表型。
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