Fortunately, there exist some key principles you can follow.
幸运的是，有一些现成的关键原则你可以遵循。
However, there exist some disadvantages.
然而，也存在一些缺点。
However, there exist some problems worth our thinking.
但尚存在一些需要思考的问题。
Their essential aspect is good, yet there exist some negative factors.
尽管主流是好的，但也存在一些消极现象。
At present, there exist some serious problems in the moral education in middle schools.
当前中学德育工作仍存在不容忽视的问题。
There exist some informal groups in library.
图书馆存在着一些非正式群体。
There exist some divergence on the character of tax overdue fine among legal scholars.
对于税收滞纳金的性质，理论界有不同的观点。
There exist some divergence on the character of tax overdue fine among legal scholars.
对于税收滞纳金的性质，理论界有不同的观点。
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