如何在React中显示数组的数组？

import React from 'react';

function App() {
  const array = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];

  return (
    <div>
      {array.map((subArray, index) => (
        <div key={index}>
          {subArray.map((item, subIndex) => (
            <span key={subIndex}>{item}</span>
          ))}
        </div>
      ))}
    </div>
  );
}

export default App;

<div>
  <div>
    <span>1</span>
    <span>2</span>
    <span>3</span>
  </div>
  <div>
    <span>4</span>
    <span>5</span>
    <span>6</span>
  </div>
  <div>
    <span>7</span>
    <span>8</span>
    <span>9</span>
  </div>
</div>