diff --git a/library/string.po b/library/string.po
index 58167517ec..2553de93b8 100644
--- a/library/string.po
+++ b/library/string.po
@@ -460,7 +460,7 @@ msgstr ""
 msgid ""
 "The *sign* option is only valid for number types, and can be one of the "
 "following:"
-msgstr ""
+msgstr "*sign* 選項只適用於數字型別，並可為以下之一："
 
 #: ../../library/string.rst:375
 msgid "``'+'``"