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。
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？
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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