我简要的写写我的感谢吧。you can focus your thesis on those topics: 1. the relationship between human and dog 人类与狗的关系 2. law of club and fang 大棒与獠牙的法则,适者生存,汰弱留强 quite similar with Charles Darwin’s theory 3. the balance between human and nature 人与自然的联系
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