Expressing a opinion I-revised

       Every year, thousands of animals are used in laboratory experiments. Because of some insignificant reasons, they are killed. Although many people take it for granted in experiments, I strongly think that we don’t have the right to kill them. First of all, it is too cruel. Animals have feelings. Some cosmetics used to keep people beautiful are made from bitterness of animals. Secondly, if we use too many animals in experiments, we will destroy the ecosystem. Natural enemies disappear; animals which are suppressed by those experimental animals will have an impact on our life. Last but not least, animals are different from humans in many ways. Something is good for animals may have a bad influence on humans. It is for all the above-mentioned reasons that I believe we can’t use animals in laboratory experiments.