The HTML string is different from the traditional selectors in that it creates the DOM elements representing that HTML string, on the fly, to be (assumedly) inserted into the document later.
HTML
同于用来表示那些HTML、并据以查询相应DOM元素的选择，一般而言，随后都会把HTML代码插入到文档中去。
代表本软件的观点；若发现问题，欢迎向我们指正。
