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.
与mp3音频压缩、低通滤波等常规的音频信号处理攻击相比，同步攻击更加难以抵抗，已经成为研究界的一个公开难题。
Compared with common audio signal processing attacks such as MP3 compression, low-pass filtering etc., they are more difficult to manage.
然而他的坦白却突出了一个法官们的难题；他们必须注意控制管理要公开，同时他们还要注意如何处理自己的心理健康这一至关重要的公共政策事项也要公开。
But his confession has highlighted a conundrum for judges; they must be seen to be in control while also being seen to deal with the vital public policy issue of their own mental health.
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