The advances on the policies research are reviewed, and the main problems concerning this theme in China are pointed out in this paper.
指出我国在相关领域存在的问题和不足，并提出相关建议。
Several problems concerning principal functional region planning are discussed in this paper. And the author hopes it is helpful to the research on it.
本文就主体功能区的几个问题展开讨论，希望有助于对本课题的研究。
Research status and existing problems concerning dryness measurement in steam-liquid two phase flow is presented, together with the discussion on development tendency.
本文介绍了气液双相流体干度测量的研究状况及存在的问题，讨论了这一领域研究工作的发展趋势。并提出了两种基于反问题想法的间接测量方法。
Research status and existing problems concerning dryness measurement in steam-liquid two phase flow is presented, together with the discussion on development tendency.
本文介绍了气液双相流体干度测量的研究状况及存在的问题，讨论了这一领域研究工作的发展趋势。并提出了两种基于反问题想法的间接测量方法。
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