1. If cloned animals could be used as organ donors, we wouldn't have to worry about cloning twins for transplants.
    如果把被克隆的动物用作器官捐赠体，那我们就不必考虑为器官移植而克隆双胞胎了。

2. If the company's technicians succeed, it may be more efficient to produce such pigs by cloning than by current methods.
    如果该公司的技术人员成功的话，那么用克隆技术来繁殖这样的猪比用现行的方法更为有效。

3. Infertile couples are also likely to seek out cloning.
    患不孕症的夫妇也可能求助于克隆。

4. Is cloning morally wrong and dangerous — or is it a valuable research tool?
    克隆是违背或危害道德的——还是一种有价值的研究手段？