The most important problem is that I find it diffcult to study my lessons.
最重要的问题是我发现我学习我的课程有些困难啊。
But later, I found that English is not diffcult at all. I read English after recording daily. I write a diary daily, and do a piece of work everyday too!
我每天都坚持写一篇英文日记，做一两份的英文练习和早晚都跟着录音机一起开口读。
An analytical confirmation was presented for whether the non-over constrained 5-DOF parallel manipulators were existed, that is still an open diffcult problem in the mechanism field.
针对非过约束五自由度并联机构是否存在这一机构学公开难题进行了解析判定。
An analytical confirmation was presented for whether the non-over constrained 5-DOF parallel manipulators were existed, that is still an open diffcult problem in the mechanism field.
针对非过约束五自由度并联机构是否存在这一机构学公开难题进行了解析判定。
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