Are the outlines of the carbon cycle really that familiar?
碳循环的轮廓真的是我们所熟悉的那样子么？
The carbon cycle is the stuff of school books.
碳循环是学校书本上的东西。
The carbon cycle is the stuff of school books.
碳的循环在学校教科书中已经讲过了。
The carbon cycle (and the global warming debate) is part of this change.
碳循环（以及地球变暖的争论）是此次变化的一部分。
But are the Outlines of the carbon cycle really that familiar?
不过关于碳循环的概要，我们真的那么熟悉吗？
Therefore, the research about carbon cycle of terrestrial eco-system is profound.
因而展开陆地生态系统内的碳循环研究意义重大。
Therefore, the research about carbon cycle of terrestrial eco-system is profound.
因而展开陆地生态系统内的碳循环研究意义重大。
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