只要有一层玻璃的形状差了仅仅千万分之一米，望远镜的精确度就会大打折扣。

If a glass layer's shape is off so much as a fraction of a micron, the scope's precision takes a mighty blow.

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理论和实验结果表明，利用所述方法对等高线进行数据简化，方法简捷，精确度高，而且能够保留原等高线的形状结构特征。

The theory and experiment results show that the simplifying method is easy and accurate, and shape construction feature of original contour can be retained.

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对精确度的控制使得我们可以从其厚度和所需制品厚度一样的材料中切割出几乎任何形状的制品来。

The control of precision that we can from its thickness and the thickness of the material in the same products cutting out the shape of the products to almost any.

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