1. <ruby>: the label acting as a comment (Chinese phonetic or character) , such as the following may be implemented style
See: https://www.w3cschool.cn/html5/html5-ruby.html
2. <abbr>: The tag acts as abbreviations, abbreviated, such as when the mouse pointer FIG PRC is displayed when PRC full word tips
See: https://www.w3cschool.cn/html5/html5-abbr.html
3. <blockquote>: The tag acts as a block references in the text within the tab may be separated out alone, and automatically retracted, as in FIG.
See: https://www.w3cschool.cn/html5/html5-blockquote.html
4. <time>: The label indicates the date and time for the role of HTML pages that appear, so that other search engines and other programs easier to extract this information
See: https://www.w3cschool.cn/htmltags/tag-time.html
Note: The label does not present any special effect on any browser, but the machine is used to identify the
5. <pre>: let the browser to help us wrap to retain text formatting needs, such as line breaks and spaces will not be canceled