diff --git a/reference/array/functions/key.xml b/reference/array/functions/key.xml
index 232417a2e..58cceadab 100644
--- a/reference/array/functions/key.xml
+++ b/reference/array/functions/key.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- EN-Revision: 94af09dfef5a1918d509f75c80051803d5e1e1e5 Maintainer: shein Status: ready -->
+<!-- EN-Revision: 76c26359d5e1293e4b0ca030dcb7fbec7f5b21cc Maintainer: shein Status: ready -->
 <!-- Reviewed: no -->
 <refentry xml:id="function.key" xmlns="http://docbook.org/ns/docbook">
  <refnamediv>
@@ -85,6 +85,7 @@ fruit5
    <simplelist>
     <member><function>current</function></member>
     <member><function>next</function></member>
+    <member><function>array_key_first</function></member>
     <member><link linkend="control-structures.foreach">foreach</link></member>
    </simplelist>
   </para>
diff --git a/reference/imap/functions/imap-delete.xml b/reference/imap/functions/imap-delete.xml
index 5bb6fff7e..28d2721e6 100644
--- a/reference/imap/functions/imap-delete.xml
+++ b/reference/imap/functions/imap-delete.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- EN-Revision: 34892f82742329af7e7b4b22be6ad21418fd9768 Maintainer: rjhdby Status: ready -->
+<!-- EN-Revision: 620dfaa2440aeb9324ff34fa7b162eb7d64ae6b9 Maintainer: rjhdby Status: ready -->
 <!-- Reviewed: no -->
 <refentry xml:id="function.imap-delete" xmlns="http://docbook.org/ns/docbook">
  <refnamediv>
@@ -31,7 +31,9 @@
      <term><parameter>message_num</parameter></term>
      <listitem>
       <para>
-       Номер сообщения
+       Строка (&string;), содержащая одно или несколько сообщений
+       в формате последовательности в стиле IMAP4 (<literal>"n"</literal>, <literal>"n:m"</literal> или их комбинация,
+       разделённая запятыми).
       </para>
      </listitem>
     </varlistentry>
diff --git a/reference/imap/functions/imap-undelete.xml b/reference/imap/functions/imap-undelete.xml
index 34819086f..88ef7e16b 100644
--- a/reference/imap/functions/imap-undelete.xml
+++ b/reference/imap/functions/imap-undelete.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- EN-Revision: 34892f82742329af7e7b4b22be6ad21418fd9768 Maintainer: rjhdby Status: ready -->
+<!-- EN-Revision: 620dfaa2440aeb9324ff34fa7b162eb7d64ae6b9 Maintainer: rjhdby Status: ready -->
 <!-- Reviewed: no -->
 <refentry xml:id="function.imap-undelete" xmlns="http://docbook.org/ns/docbook">
  <refnamediv>
@@ -29,7 +29,9 @@
      <term><parameter>message_num</parameter></term>
      <listitem>
       <para>
-       Номер сообщения
+       Строка (&string;), содержащая одно или несколько сообщений
+       в формате последовательности в стиле IMAP4 (<literal>"n"</literal>, <literal>"n:m"</literal> или их комбинация,
+       разделённая запятыми).
       </para>
      </listitem>
     </varlistentry>