Angle of attack measuring has very important meaning.

测量攻角具有十分重要的意义。

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So, the research of anchorage technology has very important meaning.

因此，研究锚固技术具有十分重要的意义。

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The research for classification has very important meaning and action.

开展城市轨道交通的分类研究具有重要的意义和作用。

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