Flutter:如何让一行中的多个按钮自动匹配屏幕宽度？

Row(
  children: [
    Expanded(
      child: ElevatedButton(
        onPressed: () {},
        child: Text('Button 1'),
      ),
    ),
    Expanded(
      child: ElevatedButton(
        onPressed: () {},
        child: Text('Button 2'),
      ),
    ),
    Expanded(
      child: ElevatedButton(
        onPressed: () {},
        child: Text('Button 3'),
      ),
    ),
  ],
)