[完成翻译] src/content/get-started/codelab.md (#1499)

Co-authored-by: Amos <[email protected]>

Author: Pleasurecruise

src/content/get-started/codelab.md

@@ -24,6 +24,11 @@ you will learn the basics of Flutter
 by creating an app
 that works on mobile, desktop, and web.
 
+现在，你可以开始“第一个 Flutter 应用”的编程练习 (codelab)。
+在接下来的一个半小时内，
+你将通过创建一个可以在移动端、桌面端以及 Web 端运行的应用
+来学习 Flutter 的基础知识。
+
 <div class="juicy-button-container">
   <img src="/assets/images/docs/get-started/codelab-goal-background.jpg" alt="The illustration of the initial and the resulting app that you will build in this codelab.">
 
@@ -34,22 +39,31 @@ that works on mobile, desktop, and web.
   {% endcomment -%}
   <a class="btn btn-primary"
      target="_blank"
-     href="https://codelabs.developers.google.com/codelabs/flutter-codelab-first">
-    &#9654;&nbsp; Start codelab
+     href="https://codelabs.developers.google.cn/codelabs/flutter-codelab-first?hl=zh-cn">
+     &#9654;&nbsp; <t>Start codelab</t><t>开始 codelab</t>
   </a>
 
 </div>
 
 :::tip
+
 The codelab above walks you through writing your first Flutter
 app for all platforms &mdash; mobile, desktop and web.
 You might prefer to take
 [another codelab written specifically for the web][codelab-web].
+
+以上编程练习 (codelab) 将指导你编写第一个适用于
+所有平台的 Flutter 应用 &mdash; 移动端、桌面端和 Web 端。
+当然你可能更想去尝试 
+[另一个专为 Web 端编写的 codelab][codelab-web]。
+
 :::
 
 [codelab-web]: /get-started/codelab-web
 
 If you prefer an instructor-led version of this codelab,
 check out the following workshop:
 
+如果你更喜欢由讲师指导的版本，可以观看以下 workshop：
+
 {% ytEmbed '8sAyPDLorek', 'Building your first Flutter app - with a Codelab!' %}