1·This is because traversal operators always return lists, even if there is only one item, or none, in the result.
这是因为遍历操作符总返回列表，即使结果中只有一个或没有项时也是如此。
2·This method can take another component as its argument, and will then transfer focus to the component that follows in the focus traversal cycle.
该方法可以把另一个组件作为它的参数，然后把焦点传递给焦点遍历循环中紧接着的那个组件。
3·A traversal can end at a single node, or at several nodes, or at no nodes at all.
遍历可以结束于单个节点、或多个节点，或者在根本没有节点处结束。
4·This is the newer form of expression languages and has excellent collection, object graph traversal, and indexing support.
这是一种新型表达式语言，拥有优秀的集合、对象图遍历和索引支持功能。
5·In the analyzed projects, after DOM traversal, the second most common task was to retrieve the text value contained in an element.
在所分析的项目中，DOM遍历以后，第二项最常进行的任务是检索在元素中包含的文本值。