寫作思路：說明研究動物的初衷和重要的原因，比如人類開展動物實驗的初衷是為了了解和認識生命現象，懷疑和挑戰宗教神學對人類思想的禁錮；人類研究動物的原因是在不能以人為實驗對象的前提下，科學研究必須借助實驗動物和動物實驗，進行疾病機理和診斷治療方法的研究，在安全、有效的情況下再推用到人類。
正文：
The original intention of animal experiment is to understand and understand the phenomenon of life, doubt and challenge the confinement of human thought by religious theology. This exploration and understanding has formed the basic life science theories of zoology, anatomy and physiology.
人類開展動物實驗的初衷是為了了解和認識生命現象，懷疑和挑戰宗教神學對人類思想的禁錮，這種探索和認識，形成了動物學、解剖學、生理學等基礎生命科學理論。
When the understanding of normal anatomy and physiology of human and animals is gradually clear, the prevention and treatment of disease research began. Thanks to animal experiments, the theoretical system of modern medicine such as immunology, microbiology, infectious diseases and virology has been gradually formed.
當對人體和動物正常解剖與生理的認識逐步清楚後，才開始疾病的預防和治療研究。得益於動物實驗，逐步形成了免疫學、微生物學、傳染病學、病毒學等現代醫學的理論體系。
In the game between human and disease, cholera, smallpox, polio and other infectious diseases have taken a large number of innocent lives. Scientists have found that many human diseases occur in some animals as well.
人類與疾病的博弈中，霍亂、天花、脊髓灰質炎等傳染病的暴發奪走了大量無辜的生命。科學家發現很多人類的疾病，在某些動物身上也會同樣發生。
On the premise of not using human as experimental objects, scientific research must rely on experimental animals and animal experiments to study the disease mechanism, diagnosis and treatment methods, and then apply it to human beings under safe and effective conditions.
在不能以人為實驗對象的前提下，科學研究必須借助實驗動物和動物實驗，進行疾病機理和診斷治療方法的研究，在安全、有效的情況下再推用到人類。