diff --git a/docs/nixpkgs/multiple-nixpkgs.md b/docs/nixpkgs/multiple-nixpkgs.md
index 88def28..2d39bb5 100644
--- a/docs/nixpkgs/multiple-nixpkgs.md
+++ b/docs/nixpkgs/multiple-nixpkgs.md
@@ -1,6 +1,7 @@
 # The Ingenious Uses of Multiple nixpkgs Instances
 
-In the section [Downgrade or Upgrade Packages](../nixos-with-flakes/downgrade-or-upgrade-packages.md), we have seen how to instantiate multiple distinct nixpkgs instances using the method `import nixpkgs {...}`. There are numerous applications for this technique, some common ones include:
+In the section [Downgrade or Upgrade Packages](../nixos-with-flakes/downgrade-or-upgrade-packages.md), we have seen how to instantiate multiple distinct nixpkgs instances using the method `import nixpkgs {...}`, and use them at any submodules via `specialArgs`.
+There are numerous applications for this technique, some common ones include:
 
 1. Instantiate nixpkgs instances with different commit IDs to install various versions of software packages. This approach was used in the previous section [Downgrade or Upgrade Packages](/nixos-with-flakes/downgrade-or-upgrade-packages.md).
 
diff --git a/docs/zh/nixpkgs/multiple-nixpkgs.md b/docs/zh/nixpkgs/multiple-nixpkgs.md
index 17fba56..95e6500 100644
--- a/docs/zh/nixpkgs/multiple-nixpkgs.md
+++ b/docs/zh/nixpkgs/multiple-nixpkgs.md
@@ -1,6 +1,6 @@
 # 多 nixpkgs 实例的妙用
 
-我们在前面 [降级与升级软件包](../nixos-with-flakes/downgrade-or-upgrade-packages.md) 一节中见过，怎么通过 `import nixpkgs {...}` 这样的方法实例化多个不同的 nixpkgs 实例。
+我们在前面 [降级与升级软件包](../nixos-with-flakes/downgrade-or-upgrade-packages.md) 一节中见过，怎么通过 `import nixpkgs {...}` 这样的方法实例化多个不同的 nixpkgs 实例，再通过 `specialArgs` 在所有子模块中使用这些 nixpkgs 实例。
 这种方法有很多的用途，常见的有：
 
 1. 通过实例化 commit id 不同的 nixpkgs 实例，用于安装不同版本的软件包。前面的 [降级与升级软件包](../nixos-with-flakes/downgrade-or-upgrade-packages.md) 一节中就是这样使用的。