diff --git a/src/content/get-started/fundamentals/dart.md b/src/content/get-started/fundamentals/dart.md
index 8916632346..4d0caae7c2 100644
--- a/src/content/get-started/fundamentals/dart.md
+++ b/src/content/get-started/fundamentals/dart.md
@@ -1,8 +1,11 @@
 ---
-title: Intro to Dart
-description: Learn about the Dart programming language
+# title: Intro to Dart
+title: Dart 入门
+# description: Learn about the Dart programming language
+description: 了解 Dart 编程语言
 prev:
-  title: Fundamentals
+  # title: Fundamentals
+  title: 基础知识 
   path: /get-started/fundamentals
 next:
   title: Widgets
@@ -19,6 +22,12 @@ code examples, feel free to skip this page.
 You do not need to be an expert in Dart to 
 continue with this series.
 
+要开始使用 Flutter，
+你需要对 Dart 编程语言有所了解，
+因为 Flutter 应用程序就是用 Dart 编写的。
+本页面是对 Dart 的简要介绍，如果你能轻松理解代码示例，可以跳过此页。
+你不需要成为 Dart 专家，就可以继续后续的内容。
+
 ## Dart
 
 Flutter applications are built in [Dart][],
@@ -26,9 +35,18 @@ a language that will look familiar
 to anyone who's written Java, Javascript,
 or any other C-like language.  
 
+Flutter 应用程序是用 [Dart][] 编写的，
+对于曾经写过 Java、Javascript 或其他类似 C 风格语言的人来说，
+这种语言应该很熟悉。
+
 :::note
+
 Installing Flutter also installs Dart,
 so you don't need to install Dart separately.
+
+安装 Flutter 时也会同时安装 Dart，
+因此你无需单独安装 Dart。
+
 :::
 
 The following example is a small program that 
@@ -39,6 +57,11 @@ If you're confident in your ability to
 understand this program, 
 feel free to skip to the page.
 
+以下是一个小型示例程序，它从 dart.dev 获取数据，
+解码返回的 JSON，并将其打印到控制台。
+如果你感觉自己已经能够理解该程序，
+那就可以跳过这一页。
+
 ```dart
 import 'dart:convert';
 import 'package:http/http.dart' as http;
@@ -73,11 +96,17 @@ This program has two parts:
 the `Package` class declaration, and the business logic, 
 which is contained in the [`main`][] function.
 
+这个程序分为两部分：
+`Package` 类的声明，以及包含业务逻辑的 [`main`][] 函数。
+
 The `Package` class contains many of the most common
 features you'll use when working with [classes in Dart][].
 This class has three members, 
 and defines a constructor and a method.
 
+`Package` 类包含了你在 [Dart 中使用类][classes in Dart] 时最常用的一些特性。
+这个类有三个成员，并定义了一个构造函数和一个方法。
+
 The Dart language is [type safe][]; it uses 
 static type checking to ensure that 
 a variable's value always matches the
@@ -90,6 +119,14 @@ there are many lines that start with `final variableName =`.
 These lines are type safe, 
 despite not being explicitly given a type.
 
+Dart 是 [类型安全][type safe] 的编程语言；
+它使用静态类型检查来确保变量的值始终与变量的静态类型相匹配。
+在定义类时，通常是必须给成员加上 `String` 类型标注，
+但由于类型推断的存在，这一步变得可选了。
+在这个例子的 `main` 函数里，
+许多行以 `final variableName =` 开头。
+尽管这些行没有显式指定类型，但它们依然是类型安全的。
+
 Dart also has built-in [sound null safety][]. 
 In the example, the `description` member is 
 declared with the type `String?`. 
@@ -102,6 +139,14 @@ You can see this demonstrated in the constructor for
 the `Package` class. It takes two required,
 positional arguments and one optional, named argument.
 
+Dart 内置了 [健全的空安全][sound null safety]。
+在这个例子中，`description` 成员的类型被声明为 `String?`，
+`?` 表示该属性可以为 null。
+而其它两个成员则不能为 null，
+如果你尝试将它们设置为 null，程序将无法编译。
+你可以在 `Package` 类的构造函数中看到这一点。
+该构造函数接受两个必需的位置参数和一个可选的命名参数。
+
 Next in the example is the `main` function. 
 All Dart programs, including Flutter apps, 
 start with a `main` function. 
@@ -110,12 +155,23 @@ including using libraries, marking functions as async,
 making function calls, using `if` statement control-flow,
 and more.
 
-:::note Where does initialization code go?
+接下来是 `main` 函数。
+所有 Dart 程序，包括 Flutter 应用程序，
+都是从 `main` 函数开始的。
+该函数展示了 Dart 语言的一些基本特性，
+包括使用库、标记函数为异步、调用函数、使用 `if` 语句控制流等等。
+
+:::note 初始化的代码应该放在哪？
+<!-- Where does initialization code go? -->
+
 The main entrypoint in a starter
 Flutter app is in `lib/main.dart`.
 The default `main` method looks
 like the following:
 
+Flutter 应用的主入口点是在 `lib/main.dart` 中。
+默认的 `main` 方法如下所示：
+
 ```dart title="lib/main.dart"
 void main() {
   runApp(const MyApp());
@@ -133,6 +189,16 @@ the [`FutureBuilder`][] API, [Deferred components][],
 or the [Working with long lists][] cookbook recipe,
 as appropriate.
 
+在调用 `runApp()` _之前_，
+可以执行任何 _快速_ 的初始化（少于一两帧的时间），
+但要注意，这时 widget 树还未创建。
+如果你需要进行较长时间的初始化，
+比如从磁盘或网络加载数据，
+请确保以不会阻塞主 UI 线程的方式进行。
+更多相关信息，请具体根据需要来参考 [异步编程][Asynchronous programming]、
+[`FutureBuilder`][] API、[延迟加载组件][Deferred components]、
+或 [处理长列表][Working with long lists] 的实用教程 (Cookbook)。
+
 Every stateful widget has an `initState()`
 method that is called when the widget is
 created and added to the widget tree.
@@ -140,17 +206,32 @@ You can override this method and perform
 initialization there, though the first line of
 this method _must_ be `super.initState()`.
 
+每个 stateful widget 都有一个 `initState()` 方法，
+它会在 widget 创建并添加到 widget 树时调用。
+你可以重写这个方法并在其中进行初始化，
+但这个方法的第一行 _必须_ 是 `super.initState()`。
+
 Finally, hot reloading your app does _not_
 call `initState` or `main` again.
 Hot restart calls both.
+
+最后，需要注意，
+热重载应用 _不会_ 再次调用 `initState` 或 `main`。
+但热重启会调用这两者。
+
 :::
 
 If these features aren't familiar to you, 
 you can find resources to learn Dart on the 
 [Bootstrap into Dart][] page.
 
+如果这些特性对你来说不太熟悉，你可以在
+[Dart 语言指引][Bootstrap into Dart] 页面上找到相关资源。
+
 ## Next: Widgets
 
+## 下一步：Widget
+
 This page is an introduction to Dart,
 and helps you become familiar with reading
 Flutter and Dart code. It's okay if you don't
@@ -160,6 +241,12 @@ of the Dart language.
 In the next section, you'll learn about the 
 building block of Flutter apps: widgets.
 
+本页面介绍了 Dart，
+并帮助你熟悉阅读 Flutter 和 Dart 代码。
+如果你对本页的所有代码不太清楚也没关系，
+重要的是你能对 Dart 语言的 _语法_ 感到熟悉。
+在下一部分，你将学习 Flutter 应用程序的构建模块：widget。
+
 [Asynchronous programming]: {{site.dart-site}}/libraries/async/async-await
 [Dart]: {{site.dart-site}}
 [Deferred components]: /perf/deferred-components
@@ -173,7 +260,12 @@ building block of Flutter apps: widgets.
 
 ## Feedback
 
+## 反馈
+
 As this section of the website is evolving, 
 we [welcome your feedback][]!
 
+由于本网站的此部分正在不断发展，
+我们 [欢迎你的反馈][welcome your feedback]！
+
 [welcome your feedback]: https://google.qualtrics.com/jfe/form/SV_6A9KxXR7XmMrNsy?page="dart"