仅供参考，我很想知道为什么 flutter doctor 会提供 2 种不同的结果。
我创建了一个新的 Flutter 应用程序。然后从命令终端，我运行 flutter doctor。
第一个结果
C:\Users\XX\AndroidStudioProjects\hello_flutter>flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (**Channel stable, 2.0.5,** on Microsoft Windows [Version 10.0.19041.746], locale en-IN)
[√] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
[√] Chrome - develop for the web
[√] Android Studio (version 4.1.0)
[√] VS Code (version 1.55.1)
[√] Connected device (2 available)
• No issues found!
C:\Users\XX\AndroidStudioProjects\hello_flutter>
来自 pubspec.yml 快捷菜单的第二个结果（位于 pubspec.yml 文件的顶部）
[√] Flutter (**Channel beta, 1.20.0**, on Microsoft Windows [Version 10.0.19041.746], locale en-IN)
• Flutter version 1.20.0 at C:\fluttersdk\flutter
• Framework revision 916c3ac648 (10 months ago), 2020-08-01 09:01:12 -0700
• Engine revision d6ee1499c2
• Dart version 2.9.0 (build 2.9.0-21.10.beta)