按希望tab键遵循的顺序单击每个控件以设置tab键顺序。

Set the TAB order by clicking each control in the order you want the TAB key to follow.

youdao

注意：键的顺序没有意义。

Note: the order of the keys has no meaning.

youdao

索引是用来定位数据页的顺序指针或键的集合。

Indexes are collections of sequentially ordered Pointers or keys used for locating data pages.

youdao

What you can do is you can iterate keys, which gives you the keys in the dictionary, and then you can choose them, but there's no guarantee in the order in which you get keys.

你能做的就是迭代得到键，这样就可以得到字典中，所有的键并进行选择，但是键的顺序,是没有保证的。

麻省理工公开课 - 计算机科学及编程导论课程节选