The equation smoothes out the irregularities of an object, transforming it mathematically into something that looks like a uniform three-dimensional sphere.
这个方程能消除物体间的差异，并能把物件精确的变形为一个统一的三维球体。
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.
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。
Therefore, the three-dimensional solubility parameters sphere model can provide the basis for the solvent selection for extraction.
研究结果表明三维溶解度参数球形模型可以为筛选萃取溶剂提 供依据。
The earths surface observation is extended to the region beyond the source with a methodof sphere surrounding three-dimensional finite source.
用梭形旋转曲面包围三维有界场源，将位场的地表观测值延拓到场源之外的空间区域。
In the paper, the three-dimensional standard parabolic equation(SPE) and near-to-far-field transformation are deduced, and the radar cross section(RCS) of a perfectly conducting sphere is calculated.
文章推导了三维标准的抛物线方程及相应的近场-远场变换理论，并计算了理想导体球的雷达散射截面；
In the paper, the three-dimensional standard parabolic equation(SPE) and near-to-far-field transformation are deduced, and the radar cross section(RCS) of a perfectly conducting sphere is calculated.
文章推导了三维标准的抛物线方程及相应的近场-远场变换理论，并计算了理想导体球的雷达散射截面；
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