它既是一个把土地的自然生态系统变为人工生态系统的过程，也是一个自然、经济、社会诸因素综合作用的复杂过程。
It is a land of natural ecosystems into artificial ecosystem process, is also a natural, economic, and social factors at the complex process.
当不同的生态系统出现时，我们可以这样解释：不同的生态系统形成的部分原因是岛屿形成过程的结果。
When varied ecosystems are present, they can be explained as resulting in part from the process that formed the islands.
由于养分的重要性和贫乏性，营养循环是我们在这门课中会讲到的最重要的生态系统过程之一。
Because of the importance of nutrients and their scarcity, nutrient recycling is one of the most significant eco-system processes that we'll cover in this course.
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