I shall not try to reproduce the policemen's English...

我不会试图去模仿那个警察讲的英语。

The effect has proved hard to reproduce.

事实证明，这种效果很难再现。

We are grateful to you for permission to reproduce this article.

非常感谢您允许我们复印这篇文章。

If we can reproduce the form we have shown in the last couple of months we will be successful.

如果我们能再采用前两个月的形式，我们就会成功。

...a society where women are defined by their ability to reproduce...

用生育能力衡量女性价值的社会

We are reproducing ourselves at such a rate that our numbers threaten the ecology of the planet.

我们的繁衍速度太快，以至于人口数量对地球的生态系统造成了威胁。