1、动物研究对人类医学的发展作出了重大的贡献。

Animal research has contributed greatly to man's medical development.

2、动物研究是否与人体健康有关，人们持不同态度。

People hold different attitudes as to that weather animal research is relevant to physical health.

3、用于实验的动物数量在过去二十年中已大大减少了。

The number of animals used in experiments has been greatly reduced over the past 20 years.

4、研究的新成果表明，少数实验可以放弃使用动物。

New research finding show that a few experiment.

5、尽管医学技术越来越先进，但离案例停止使用动物做实验仍然很远。

Although medical technology is more and more advanced， it is still far from totally stopping using animals in experiments.