Designated by a colon preceding the name, pseudo-classes are independent of particular elements and instead look at what's happening within the document.
伪类的表示方法是在名称前面加一个冒号。伪类与特定元素无关,而是根据文档中发生的情况应用样式。
2
This represents a relationship between these two elements that is independent of the main hierarchy.
这表示这两个与主层次结构无关的元素之间的关系。
3
These include MXML elements and attributes which values are independent of the specific SOAP binding settings.