对于这种方法，在虚拟层是不支持缓存的。
Caching at the virtualization level is not possible with this approach.
它的内部构成主要分为实体层、虚拟层和支持层。
Its internal structure can be divided into physical level, virtual level and support level.
这是下一层次的虚拟字段。
最后，本文从涡层的角度重新推导了翼型虚拟质量计算公式。
Finally, in view of vortex sheet, the formula of virtual mass has been re-derived.
最后，本文从涡层的角度重新推导了翼型虚拟质量计算公式。
Finally, in view of vortex sheet, the formula of virtual mass has been re-derived.
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