The children attribute of item "Edith Barney" is not a false value, so the tree model will treat it as a node with children.
条目“EdithBarney”的children属性不是一个假值，因此，树模型将其视为一个有子节点的节点。As mentioned above, the nested syntax is often mistaken for subclassing by users who are not already familiar with extensions.
正如上面所提到的，嵌套的语法通常被错误地认为有子类化的关系——尤其是对那些还不熟悉扩展的用户来说。A node that has no children is called a leaf node.
没有子节点的节点称为“叶节点”。Yan said the father, who has a wife has a son, a couple of years has been "playing" with his daughter.
闫父说，此人有妻有子，一两年来一直“耍”其女儿。Nodes do not have children , this method has no effect .
节点没有子级，因此该方法无效。This element is a child of the update element, and has no children.
此元素是更新元素的子元素，它没有子元素。Each node of a scene graph has a list of its children as well as a transformation in the 3D space.
每个场景结点既可有子结点也可以在3D空间变换的函数。branch? takes a node and returns whether it's possible for that node to have children.
branch？获取一个节点，并返回对该节点是否可能有子节点的判断。Popup menus are menus that have submenus, a menuitem is just a menuitem with an associated ID.
Popup（弹出）菜单是有子菜单的菜单，一个菜单项仅是一个有关联ID的菜单项。