diff --git a/_posts/help/1970-01-01-ubuntu.md b/_posts/help/1970-01-01-ubuntu.md
index d50d661..fb1f8ef 100644
--- a/_posts/help/1970-01-01-ubuntu.md
+++ b/_posts/help/1970-01-01-ubuntu.md
@@ -51,3 +51,5 @@ deb https://{%endraw%}{{ site.hostname }}{%raw%}/ubuntu/ {{release_name}}-securi
 <code id="apt-content">
 </code>
 </pre>
+
+本镜像仅支持32位和64位x86架构的系统，对于 ARM、PowerPC 架构请使用 ubuntu-ports 镜像。