However, for the problem of environment pollution and energy shortage, there are still existing some problems to be solved.
但在诸多方面仍存在着很多难题亟待解决，以更有效地缓解当今环境污染和资源匮乏问题。
Currently, some problems still existing in the diagnosis and treatment of BDC: (1) Imaging techniques lacked standard guidance notions.
当前，胆管癌的诊治尚存在不少问题：(1)影像学检查技术的应用缺乏规范性指导意见。
Most of those changes are positive, but there are still some problems existing in the farmers' thoughts and ideas.
当前，农民思想舆论主流是积极健康的，但仍然存在许多问题。
But there are still some problems in existing calculation method.
但从现有的测算方法看还存在着一定的问题。
This paper reviews and summarizes main progresses in the study on quantitative change in cultivated land and points out some problems still existing in the study and possible solutions.
本文通过对我国耕地数量变化研究的回顾，总结了耕地数量变化研究方面的主要进展，并指出了研究中存在的主要问题及其给人们的启示。
Undoubtedly, the accomplishment from the antecedent researchers is fruitful, but there are still some problems existing.
从前人的研究成果看虽然取得了一定的成就，但也存在不少问题。
Power plant boiler air preheater's secondary burning phenomenon exists, the existing detection technology still exists some problems.
电站锅炉空气预热器存在二次烧现象，现有检测技术还存在一些问题。
Power plant boiler air preheater's secondary burning phenomenon exists, the existing detection technology still exists some problems.
电站锅炉空气预热器存在二次烧现象，现有检测技术还存在一些问题。
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