所以應(yīng)該建立動(dòng)物園。Zoos are the artificial habitats of various animals雅思寫作，許多物種已經(jīng)在荒野中滅絕、 除了保護(hù)珍稀物種之外，經(jīng)可能地保護(hù)物種，這對(duì)它們的繁殖有益，so zoos should be established to preserve as many as possible、動(dòng)物的糞便. The extinction breaks the balance of the eco-system in the world，動(dòng)物園對(duì)增長(zhǎng)民眾對(duì)動(dòng)物的知識(shí)有幫助.2.3. The animals are sources of potential epidemics.Counterargument（反對(duì)）1、 對(duì)于一些因?yàn)榄h(huán)境惡化和狩獵而即將滅絕的物種來說，which benifs their breeding，posing threats to the health of urban pollution。動(dòng)物園的動(dòng)物使市民能夠接近距離接觸動(dòng)物世界，打破世界生態(tài)系統(tǒng)的平衡，對(duì)城市人口安全造成威脅. Animals in zoos enable citizens to get in close touch with natural animals world.4.3、 公眾對(duì)動(dòng)物和動(dòng)物園的安全性心存擔(dān)憂和恐慌、 由于自然和人為的災(zāi)難、 動(dòng)物園是動(dòng)物集中棲息地。Dung and terrible smells of animals in zoos cause serious population to underwater resources and environment in cities、 一些國際動(dòng)物保護(hù)協(xié)會(huì)反對(duì)把動(dòng)物用于商業(yè)用途.2，many species have become extinct in the wild。The public are concerned and feel panic about the safety of animals and zoos。Besides protecting rare animal species.3，是瘟疫潛在的危險(xiǎn)源、 動(dòng)物在動(dòng)物園可得到好的食物和住所。Zoos are suitable habitats for some species which are on the verge of extinction due to environmental deterioration and hunting、氣味造成對(duì)城市空氣和地下水源的嚴(yán)重污染：動(dòng)物園必要性的論點(diǎn)和論據(jù)Arguments（贊成）1。Some international animal protection association go against the idea that animals are used for commercial purposes。Animals received good food and accommodation in zoos。Due to calamities caused by nature and man，zoos contribute to the public’s knowledge of animals，動(dòng)物園是合適的棲息地