Update appendix-obsolete-pgresetxlog.sgml

Author: chegong18

postgresql/doc/src/sgml/appendix-obsolete-pgresetxlog.sgml

@@ -4,13 +4,23 @@
 -->
 
 <sect1 id="app-pgresetxlog" xreflabel="pg_resetxlog">
+<!--==========================orignal english content==========================
   <title><command>pg_resetxlog</command> renamed to <command>pg_resetwal</command></title>
+____________________________________________________________________________-->
+  <title><command>pg_resetxlog</command> 重命名为 <command>pg_resetwal</command></title>
 
+<!--==========================orignal english content==========================
+   <indexterm>
+     <primary>pg_resetxlog</primary>
+     <see>pg_resetwal</see>
+   </indexterm>
+____________________________________________________________________________-->
    <indexterm>
      <primary>pg_resetxlog</primary>
      <see>pg_resetwal</see>
    </indexterm>
 
+<!--==========================orignal english content==========================
    <para>
     PostgreSQL 9.6 and below provided a command named
     <command>pg_resetxlog</command>
@@ -20,5 +30,11 @@
     <link linkend="release-prior">the release notes for PostgreSQL 10</link> for details
     on this change.
    </para>
+____________________________________________________________________________-->
+   <para>
+    PostgreSQL 9.6 及以下版本提供一个命令名为<command>pg_resetxlog</command> <indexterm><primary>pg_resetxlog</primary></indexterm> ，用以重置 write-ahead-log (WAL) 文件。
+    这个命令被重命名为 <command>pg_resetwal</command>, 关于<command>pg_resetwal</command>的文档请参见<xref linkend="app-pgresetwal"/>，
+    关于此变更的详情请参见<link linkend="release-prior">the release notes for PostgreSQL 10</link>。
+   </para>
 
 </sect1>