feat: minor updates

docs/introduction/index.md

@@ -1,6 +1,6 @@
 # Introduction to Nix & NixOS
 
-Nix is a declarative package manager that enables users to specify the desired system state in configuration files. It takes responsibility for achieving that goal.
+Nix is a declarative package manager that enables users to specify the desired system state in configuration files, and it takes responsibility for achieving that state.
 
 > In simple terms, "declarative configuration" means that users only need to declare the desired outcome. For instance, if you declare that you want to replace the i3 window manager with sway, Nix will assist you in achieving that goal. You don't have to worry about the underlying details, such as which packages sway requires for installation, which i3-related packages need to be uninstalled, or the necessary adjustments to system configuration and environment variables for sway. Nix automatically handles these details for the user (provided that the Nix packages related to sway and i3 are properly designed).
 
@@ -20,10 +20,8 @@ However, I recently encountered numerous environmental issues while using Endeav
 
 That's when I decided to switch to NixOS.
 
-To my delight, NixOS has exceeded my expectations. The most astonishing aspect is that I can now restore my entire i3 environment and all my commonly used packages on a fresh NixOS host with just one command. It's truly fantastic!
+To my delight, NixOS has exceeded my expectations. The most astonishing aspect is that I can now restore my entire i3 environment and all my commonly used packages on a fresh NixOS host with just one command `sudo nixos-rebuild switch --flake .`. It's truly fantastic!
 
-The rollback capability of NixOS has instilled a great deal of confidence in me—I no longer fear breaking the system. I've even ventured into experimenting with new things on
-
- NixOS, such as the hyprland compositor. Previously, on EndeavourOS, I wouldn't have dared to tinker with such novel compositors, as any system mishaps would have entailed significant manual troubleshooting using various workarounds.
+The rollback capability of NixOS has instilled a great deal of confidence in me—I no longer fear breaking the system. I've even ventured into experimenting with new things on NixOS, such as the hyprland compositor. Previously, on EndeavourOS, I wouldn't have dared to tinker with such novel compositors, as any system mishaps would have entailed significant manual troubleshooting using various workarounds.
 
 This is why I chose NixOS.

docs/introduction/installation.md

@@ -5,6 +5,6 @@ Nix can be installed in various ways:
 1. As a package manager on macOS, Linux, or WSL.
 2. As the system environment manager on NixOS, a Linux distribution that utilizes Nix for system management.
 
-This book primarily focuses on the usage of NixOS and Flakes. Therefore, we will skip content that pertains solely to Nix.
+This book primarily focuses on the usage of NixOS and Flakes. Therefore, we will skip content that pertains solely to Nix(such as installation on macOS, Linux, or WSL).
 
 The installation process of NixOS is straightforward, but we won't delve into the specifics here. For more information, please visit the official download site at <https://nixos.org/download.html>.

docs/zh/introduction/index.md

@@ -18,7 +18,7 @@ Nix 是一个声明式的软件包管理器，用户需要通过某些配置声
 
 ## 为什么选择 NixOS？
 
-好几年前就听说过 Nix 包管理器，它用 Nix 语言编写配置来管理系统依赖，此外基于 Nix 包管理器设计的 Linux 发行版 NixOS，还能随时将系统回滚到任一历史状态（额实际上这个回滚有些限制，后面会介绍）。 虽然听着很牛，但是不仅要多学一门语言，装个包还得写代码，当时觉得太麻烦就没研究。
+好几年前就听说过 Nix 包管理器，它用 Nix 语言编写配置来管理系统依赖，此外基于 Nix 包管理器设计的 Linux 发行版 NixOS，还能随时将系统回滚到任一历史状态（额实际上这个回滚有些限制，前面提过了）。 虽然听着很牛，但是不仅要多学一门语言，装个包还得写代码，当时觉得太麻烦就没研究。
 
 但是我最近在使用 EndeavourOS 时遇到了一系列麻烦事儿，花了大量的精力去解决，搞得我精疲力尽。
 我仔细一想，遇到的这些问题归根结底还是系统没有版本控制跟回滚机制，导致出了问题不能还原，就必须得各种查资料找 Bug，手动修复系统状态。