在这种情况下，您要选择父级业务对象，并定义两个键属性：一个指向父级键，一个指向子级键。
In this case you select the parent business object and define two key attributes: one pointing to the parent key and one pointing to the child key.
将一个元素在层级中向下移动一级：选择将成为子元素的元素并单击Tab。
Move an element a level down in the hierarchy: Select the element to become the child element and click Tab.
赜系统支持服务程序的梅径选择或抠制程羊。此程畜根据所孕子隙统支持羹务功能的耘先级提憨多任务和镭制支持。
The routing or controlling routines of Subsystem Support Services. This routine provides multitasking and control support, on a priority basis, all Subsystem Support Services functions.
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