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作者词汇基础扎实，拼写也很棒；文章在句法方面做的很棒，从句和复杂句的使用不错；不能熟练使用过渡词，文章结构欠佳。
Ecosystem plays a significant role in our future. However, human power has been pushing some organic beings to extinction. We have no choice but to take measures to protect the ecosystem, otherwise, we will be on the verge of extinction. I disagree with that it is too late to do anything, we could making changes if we were really prepared. According to theory of evolution, it's normal to have some species died out and new species bore. The mass extinction happened quite a few times in earth's life history, but lives are still varied today. The resilience and resistance of biosphere is far more strong than we may expect. On the other hand, to maintain a sustainable development, the environment capacity is what we need to considered. So, scientist assessed and monitored all kinds of ecosystems along with its species dynamic. Politicians and environmentalist gathered and managed to combat all kind of environment problems from biodiversity to global change. Public awareness of protecting mother nature is unprecedented. All kinds of nature reserves being set up to keep those endangered species and their habitat. So this is a question about whether we should do ourselves a favor to make a better future or to give up our chance and to lose this beautiful planet. As a responsible citizen, I will definitely do my part to protect our nature.
