reproductive cloning造句怎么写

Bush also contended that it would be difficult to enforce a ban on reproductive cloning while allowing research cloning, and he called the presumed benefits of research cloning "highly speculative."

the reason,in part,was his"disreputable conduct[on]reproductive cloning.

But at root, making people (or merely appearing to do so, as in IVF and reproductive cloning) is arguably the ultimate "unnatural" act.