Its internal structure can be divided into physical level, virtual level and support level.

它的内部构成主要分为实体层、虚拟层和支持层。

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After the virtual level of atmospheric boundary layer wind tunnel test of homogeneity, parameters and boundary conditions can explain the virtual wind tunnel to maintain a balance of self.

同时对已建立的虚拟大气边界层风洞进行水平均匀性检验，说明所选择的参数及边界条件基本能使虚拟风洞具有自保持平衡性。

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The assets the cloud consumer needs to identify are those he can control: the operating systems, network equipment, and deployed applications at the virtual machine level.

云消费者需要识别的资产就是他们能够控制的资产：操作系统、网络设备以及在虚拟机级部署的应用程序。

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Bubble Witch Saga is unique in that with the mobile version, all the progress a player has made in the game (whether virtual goods, level completion rating or status) will be synchronized across devices.

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In October, the full NCAA board will decide whether to formally adopt the proposed new anti-violence rules, and even if they do, they will only succeed if advocates nationwide are vocal and persistent about demanding that Emmert take a similarly strong stand against all sexual violence, not only scandals that rise to a level of virtual child sex trafficking.

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Like the Rosetta Stone's ubiquitously marketed computer-based product, TOTALe Online works by means of virtual immersion: Regardless of skill level, you listen in on dialogues, repeat sentences and answer questions entirely in the language you're studying.

WSJ: The Best Language Learning Apps | App Happy