对二氧化碳其他方面的应用作了简单介绍，并对部分不成熟技术作了讨论。
Other aspects of the application as a simple introduction to carbon dioxide, and discusses some immature technology.
限制：技术不成熟。
限制：技术不成熟，工程上问题多多。
Limitations: The technology is immature, with many engineering issues unresolved.
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