根结点元素逻辑上包含（拥有或者是其双亲结点）其他的 UML 元素，而这些元素依靠根结点来为容器和名称空间提供它们的需求。
The root element logically contains (owns or is the parent of) the other UML elements that depend on it to provide their requirements for containership and namespace.
这款新的非线性结点ORION 2.4探测器更小更轻，一般隐蔽安装在墙壁，地板，天花板，灯具，家具或容器内。
The new smaller, lighter ORION 2.4 Non-Linear Junction Detector locates hidden electronics in walls, floors, ceilings, fixtures, furniture, or containers, even when they are turned off.
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