这就是这一建筑作品的从入口开始的全部工作方式，在“前进”与“后退”之间微妙的双重运动中展开。

That is how the building works, from the entrance onwards, in a subtle two-fold movement of advance and retreat.

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在双重职业路径的选择是不是所有的企业，但是，因为它往往会比传统的运动系统更加昂贵。

The dual career-path choice is not for all firms, however, because it tends to be more costly than traditional movement systems.

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田径运动具有竞技性和健身性双重属性。

Track and field sports have dual features of competition and body building.

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