unit 4 wildlife protection
导读：大自然是一个完整的生物链，人和动物的和谐相处会使我们所生活的环境更加美好，保持生态平衡是我们义不容辞的责任，对此你的观点如何呢？
with rapid extinction of many wild species, more and more people come to realize the great significance of wildlife protection.
we have to understand the problem in a new light that we protect ourselves through protecting wildlife. on the one hand, any species of wildlife, as a critical joint of the ecological chain, helps to establi资源难易程度:★★★★★★★★★★★★★★★
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