Some countries began to reform their legal systems and forbid research into human cloning.

一些国家开始改革他们的法律制度，禁止研究人类克隆。

Opposes human cloning.

反对人类克隆。

I'm against human cloning.

我反对人类克隆。

Why do we need research into human cloning?

为啥我们还要研究克隆人类呢？

The United States should permit human cloning.

美国应该允许人类克隆。