不清楚System.Diagnostics.Process.Start(e.LinkText); 的含义

using System;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace Test11
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            richTextBox1.Multiline = true;
            richTextBox1.ScrollBars = RichTextBoxScrollBars.Vertical;
            richTextBox1.Text = "欢迎登录 http://www.baidu.com编程体验网";
        }
        private void richTextBox1_LinkClicked(object sender, LinkClickedEventArgs e) //标识符已定义好
        {
            System.Diagnostics.Process.Start(e.LinkText);    //识别出超链接，点击后可以访问
        }

        private void richTextBox1_TextChanged(object sender, EventArgs e)
        {

        }
    }
}