So it is very significant to have a study on layout of our today's newspaper, conclude experience, make analysis and put forward thought from the angle of communication science.

因此，从传播学角度对我国现代报纸的版面设计进行研究，总结经验，剖析问题，科学借鉴，提出思考，都将具有十分重要的现实意义。

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Then we conclude the five-bar's classification and the gear ratio and phase Angle in each classification to be full rotatability.

然后详细的讨论了五杆机构在每一种分类情况下机构中存在双曲柄时机构的传动比及相位角的范围。

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