Sun JDK 使用一种称为 卡片标记（card marking）算法的改进算法以标识对老一代对象的字段中包含的指针的修改。
The Sun JDKs use an optimized variant of an algorithm called card marking to identify modifications to pointers held in fields of old-generation objects.
卡片-包括故事的描述，为谁服务，唯一标识，提示信息，对迭代计划编制有所帮助。
Card - the written description of the story, serves as and identification, reminder, and also helps in planning.
卡片上两种应用的存在情况可以由应用类型 标识（ATI）来指明。
The existence of the two applications on a card can be indicated by Application Type Identification (ATI).
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