Some problems existed in Chinese re industry are pointed out.
指出了我国稀土行业存在的问题。
But, there are some problems existed in its study.
但是，实证会计研究中也存在着不少问题。
Meanwhile, the key problems existed in the process development were also discussed.
同时论述了在工艺过程开发中的关键问题。
These problems existed in his time as much as they do now.
在他的时代，这些问题几乎都已存在。
The second part researches on the current situation and problems existed.
第二部分探究了现行大规模考试安全面临的形势和存在的问题。
The second part researches on the current situation and problems existed.
第二部分探究了现行大规模考试安全面临的形势和存在的问题。
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