Pormpuraawa人不仅知道了他们面对的方向，而且还自然而然地利用这一空间方位构建了他们的时间表征。

The Pormpuraawans not only knew that already, but they also spontaneously used this spatial orientation to construct their representations of time.

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提出了表征路面表面空间几何特征的整体特征参数和局部特征参数。

The whole feature parameters and local feature of spacial geometric features of road surface are put forward.

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这种方法是通过对特征值的研究，追求表征空间的维数压缩。

Such technique pursues, through the study of the eigenvalues, the reduction of the dimensionality in the representation space.

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