However, a simple two-dimensional density plot of this function immediately gives us a good feeling for the simple and beautiful symmetry contained in the original formula.

然而，该函数的简单二维密度绘图马上给我们一种清晰的感觉，那就是在原公式中包含的简单而漂亮的对称结构。

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For example, to model the sound of a drum, there would be a formula for how striking the drumhead injects energy into a two dimensional membrane.

举例来说，对于模拟鼓声，将有一个公式阐明敲击鼓面加添能量到二维的膜。

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Here, an approximate formula educed by dimensional analysis is presented, which involves fracture velocity and loading rate, to calculate kinetic energy increment.

而动能增量可由量纲分析法推导的能反映裂缝扩展速度和加载率影响的计算公式表示。

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