4.2:H304201 Use abbr and avronym to indicate Web page text abbreviation.

Improper design

In the description below, the abbreviations "SARS", "Hi-Tech" do not have relative explanation.

<P>
Worldwide experts think that SARS is likely to hit again this year in the late autumn, 
the estimated threat to Asia is high in technology.
</P>
          

Proper demonstration

In the above example “SARS“ and “Hi-Tech“ was written as<ABBR title="Severe Acute Respiratory Syndrome">SARS</ABBR>and<ACRONYM title="High Technology">Hi-Tech</ACRONYM>。

<P>
Worldwide experts think that<ABBR title="Severe Acute Respiratory Syndrome">SARS</ABBR>
is likely to hit again this year in late autumn, 
the estimated threat to Asia is<ACRONYM title="High Technology">Hi-Tech</ACRONYM>high in technology.
</P>