traversal

基本解釋

This brings us to the concept of focus traversal hierarchy, and therefore of up and down focus cycles.
這讓我們理解了焦點遍歷層次結(jié)構的概念，從而明白了向上和向下的焦點循環(huán)的概念。
This is because traversal operators always return lists, even if there is only one item, or none, in the result.
這是因為遍歷操作符總返回列表，即使結(jié)果中只有一個或沒有項時也是如此。
This method can take another component as its argument, and will then transfer focus to the component that follows in the focus traversal cycle.
該方法可以把另一個組件作為它的參數(shù)，然后把焦點傳遞給焦點遍歷循環(huán)中緊接著的那個組件。

What if there had been less shooting, and more puzzles and traversal?
FORBES: [Spoilers follow.]