In the mark phase, all the "live" objects are added to mark vector.
在标记阶段，将所有“活的”对象添加到标记向量。
The vector mark is adopted to simplify the structure and to depict the composition of the models.
采用向量标记推导模型，简化了模型结构，同时描述了模型的构成；
Flex stands out from most other RIA-based technologies because it supports vector-based drawing and direct embedding of SVG mark-up files.
Flex优于大部分基于RIA的技术，因为它支持基于矢量的绘制和直接嵌入SVG标记文件。
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