By very carefully 'feeling' the balancing point of each rock he handles - a process that requires awesome skill and patience - Gray is able to arrange them in ways that seem incredible.

通过非常仔细地“感觉”拿着的每块石头的平衡点——一种需要非凡技巧和耐心的过程——格雷能够以似乎难以置信的方式把它们排列起来。

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Adrian then arranges them in precarious positions by very carefully 'feeling' the balancing point of each rock - a process that requires supreme skill.

然后，阿德里安会小心翼翼地“感受”每块石头的平衡点，把它们摆放成各种造型，这些石头的摆放方式看起来就有种摇摇欲坠的感觉。这种叠石头的过程要求具有高超的技巧。

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Based on balancing equation of framework of rock and soil and the principle of virtual work, the stress balancing equation can be acquired.

根据岩土体骨架的平衡方程和虚功原理建立应力场平衡方程。

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