而建立机床结构精确的动力学有限元模型的关键是对机床机构中结合面的动力学描述。
The key to establish a precise dynamic model with Finite Element Method is the simulation of the dynamic characteristics of the joint face in the machine tool.
替换可能是一个令人惊叹的精确过程，因此贝壳纹饰的细节，树木的年轮和骨的微妙结构都被准确地保存。
Replacement can be a marvelously precise process, so that details of shell ornamentation, tree rings in wood, and delicate structures in bone are accurately preserved.
热岛的精确结构取决于几个因素。
The precise configuration of a heat island depends on several factors.
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