To what extent competition determines the composition of a community and the density of particular species has been the source of considerable controversy.

竞争对于一个群落的组成和特定物种的密度的决定程度有多大，一直是相当有争议的问题。

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You are to write a composition of about 400words on the following topic: Competition or Cooperation?

写一篇约400词的作文，题目如下：竞争或合作？

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I love literature and writing, and have received awards in the composition competition. in professional journals were published in a lot of technical papers, one more was the core journals rather.

我喜欢文学和写作，并获得了作文比赛中获奖。在专业期刊在大量的技术论文发表，还有一个是核心期刊比较。

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