提出了一种测量三维面形的新方法。

A new method of three dimension shape measurement is presented.

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三维面形测量具有很高精度，位相测量轮廓术是其中一种重要方法。

Because of the precision of phase measuring profilometry, it is an important way of three-dimensional measuring.

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他在1904年就提出猜想：在四维空间，所有单连通的封闭三维面都能转化为一个三维球体。

His conjecture, made in 1904, was that in this four-dimensional world, all closed three-dimensional surfaces that are simply connected could be transformed to look like a three-dimensional sphere.

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So that you take every sodium and you count all of its nearest neighbors, next nearest neighbors, next next nearest neighbors, not only on a line but in the plane and above and below in all three dimensions and go through that calculation, it is even more negative.

你考虑到每一个钠原子,你要考虑到它最近的原子，第二近的原子，第三近的原子，不是在一条线而是在一个面上,以及面上与面下的三维空间,再完成计算，这将会更负。

麻省理工公开课 - 固态化学导论课程节选