If a user specific image combination is not already available as an image, an authorized user can have the flexibility to construct their own image from the VCL library components.
如果一个特定于用户的映像组合没有以映像的形式出现，那么经过授权的用户则可以灵活地从vcl库组件中构建自己的映像。
There are few principal components in the VCL architecture as shown in Figure 2.
如图2所示，VCL架构包含几个主要组件。
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