在均匀格点的基础上，给出了基于柱坐标的全矢量非均匀格点有限差分方法(FDM)，并采用了完美匹配层(PML)边界条件。

A general formula is derived for a finite-difference method (FDM) with non-uniform grids in a cylindrical coordinate system, and a perfectly matched layer (PML) is used for the boundary treatment.

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一层焦糖慕斯，一层椰奶慕斯，与素裹椰丝的糕体完美匹配，一口畅享多口味。

Layers of sponge cake filled with caramel mousse and coconut mousse, coated with coconut powder.

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