Some problems existing in indoor gas engineering and solving methods are discussed.

讨论了室内燃气工程中存在的有关问题及解决方法。

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Some problems existing in Chinese public health nursing management are found out by research.

通过调查研究了解我国公共卫生护理管理中存在的问题；

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But because of some problems existing in tax planning, it needs further theory research and practised direction.

但在纳税筹划实践中，还存在很多问题，需要更深入的理论研究和实践指导。

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Some solutions introduced new problems or exacerbated existing ones, so trade-offs had to be made to find the proper balance.

ENGADGET: Engineering a better bicycle with DBC City Bike Design Alt