[求助]谁解释 google搜索的参数

<SearchPlugin xmlns="http://www.mozilla.org/2006/browser/search/" xmlns:os="http://a9.com/-/spec/opensearch/1.1/">
<os:ShortName>Google </os:ShortName>
<os:Description>Google</os:Description>
<os:InputEncoding>UTF-8</os:InputEncoding>
<os:Image width="16" height="16">data:image/png;base64,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</os:Image>
<SearchForm>https://www.google.com/</SearchForm>
<os:<Url type="text/html" method="GET" template="https://www.google.com/ncr#q={searchTerms}"></Url>
  <os:Param name="output" value="search"/>
  <os:Param name="sclient" value="psy-ab"/>
  <os:Param name="q" value="{searchTerms}"/>
  <os:Param name="btnG" value=""/>
  <os:Param name="oq" value=""/>
  <os:Param name="gs_l" value=""/>
  <os:Param name="pbx" value="1"/>
</os:Url>
</SearchPlugin>

<os:Param name="output" value="search"/>
<os:Param name="sclient" value="psy-ab"/>
<os:Param name="q" value="{searchTerms}"/>
<os:Param name="btnG" value=""/>
<os:Param name="oq" value=""/>
<os:Param name="gs_l" value=""/>
<os:Param name="pbx" value="1"/>