Update ref/end.sgml-200604

——row43，调整英文内容为：
END [ WORK | TRANSACTION ] [ AND [ NO ] CHAIN ]
——row47，调整翻译内容为：
END [ WORK | TRANSACTION ] [ AND [ NO ] CHAIN ]

——row102至120，增加英文和翻译内容为：
   <varlistentry>
<!--==========================orignal english content==========================
    <term><literal>AND CHAIN</literal></term>
____________________________________________________________________________-->
    <term><literal>AND CHAIN</literal></term>
    <listitem>
<!--==========================orignal english content==========================
     <para>
      If <literal>AND CHAIN</literal> is specified, a new transaction is
      immediately started with the same transaction characteristics (see <xref
      linkend="sql-set-transaction"/>) as the just finished one.  Otherwise,
      no new transaction is started.
     </para>
____________________________________________________________________________-->
     <para>
      如果规定了<literal>AND CHAIN</literal>，则立即启动与刚完成事务具有相同事务特征(参见 <xref linkend="sql-set-transaction"/>)的新事务。 否则，没有新事务被启动。
     </para>
    </listitem>
   </varlistentry>

Author: chegong18

postgresql/doc/src/sgml/ref/end.sgml

@@ -40,11 +40,11 @@ ____________________________________________________________________________-->
  <refsynopsisdiv>
 <!--==========================orignal english content==========================
 <synopsis>
-END [ WORK | TRANSACTION ]
+END [ WORK | TRANSACTION ] [ AND [ NO ] CHAIN ]
 </synopsis>
 ____________________________________________________________________________-->
 <synopsis>
-END [ WORK | TRANSACTION ]
+END [ WORK | TRANSACTION ] [ AND [ NO ] CHAIN ]
 </synopsis>
  </refsynopsisdiv>
 
@@ -98,6 +98,26 @@ ____________________________________________________________________________-->
      </para>
     </listitem>
    </varlistentry>
+
+   <varlistentry>
+<!--==========================orignal english content==========================
+    <term><literal>AND CHAIN</literal></term>
+____________________________________________________________________________-->
+    <term><literal>AND CHAIN</literal></term>
+    <listitem>
+<!--==========================orignal english content==========================
+     <para>
+      If <literal>AND CHAIN</literal> is specified, a new transaction is
+      immediately started with the same transaction characteristics (see <xref
+      linkend="sql-set-transaction"/>) as the just finished one.  Otherwise,
+      no new transaction is started.
+     </para>
+____________________________________________________________________________-->
+     <para>
+      如果规定了<literal>AND CHAIN</literal>，则立即启动与刚完成事务具有相同事务特征(参见 <xref linkend="sql-set-transaction"/>)的新事务。 否则，没有新事务被启动。
+     </para>
+    </listitem>
+   </varlistentry>
   </variablelist>
  </refsect1>