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作者词汇基础扎实，拼写也很棒；作者句法知识很棒，适当增加从句的使用，会取得更不错的成绩；上下文衔接不流畅，文章结构不严谨。
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, practical measures are what we need to considered. That's why scientist assessed and monitored all kinds of ecosystems along with its species dynamic. Politicians and environmentalist gathered and managed to combat all kinds of environment problems from biodiversity to global change as well. Public awareness of protecting mother nature also reached unprecedented high. 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 give up. As a responsible citizen, I will definitely do my part to protect our nature.
