diff --git a/README.md b/README.md
index 3387042..6d18990 100644
--- a/README.md
+++ b/README.md
@@ -21,28 +21,34 @@
 ### 在 Linux 系统上
 
 ```console
-$ curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
-$ cargo install mdbook
+curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
+cargo install mdbook
 ```
 
 ### 在 Windows 上
 
+在 "Administrator: Windows Powershell" 中，先安装 choco
+
 ```powershell
-# 在 "Administrator: Windows Powershell" 中，先安装 choco
-> Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://community.chocolatey.org/install.ps1'))
-# 经由 choco 安装 msys2
-> choco install -y msys2
+Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://community.chocolatey.org/install.ps1'))
 ```
 
+经由 `choco` 安装 `msys2`
+
+```powershell
+choco install -y msys2
+```
+
+在 msys2 中安装 mdbook
+
 ```console
-# 在 msys2 中安装 mdbook
-$ pacman -S mingw-w64-x86_64-mdbook
+pacman -S mingw-w64-x86_64-mdbook
 ```
 
 安装好 `mdbook` 后, 带一些命令行参数和开关运行服务器：
 
 ```console
-$ mdbook serve ~/ccna60d -p 8080 -n 127.0.0.1 --open
+mdbook serve ~/ccna60d -p 8080 -n 127.0.0.1 --open
 ```
 
 > 注：当在 Windows 系统上时，咱们要在 `msys2` 的终端窗口中运行此命令。