However, there exist some problems worth our thinking.
但尚存在一些需要思考的问题。
However, there exist some problems which need our attention.
也存在着一些需要的问题。
At present, there exist some problems in music class in middle school.
现阶段，中学音乐教学课程中存在着一些令人不太满意的问题。
But it is no doubt that there still exist some problems.
但不可否认，这其中也存在不少的问题。
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。
Although it has gotten some achievements, there also exist many problems and shortcomings.
虽然取得了一些成就，同时也存在诸多题目和不足。
Although it has gotten some achievements, there also exist many problems and shortcomings.
虽然取得了一些成就，同时也存在诸多题目和不足。
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