问拒绝访问:7000在nodejs事件498中

EN

const http=require('http');
const PORT_=process.env.PORT||7000;
const express=require('express');
const app=express();


app.use((req,res,next)=>{
    res.send("Hellow world"+PORT_);
    next();
});
app.listen(PORT_,(err)=>{
    err===true ? console.log(err):console.log('run on '+port_);
});

node:events:498
      throw er; // Unhandled 'error' event
      ^
Error: listen EACCES: permission denied :::7000
Emitted 'error' event on Server instance at:
    at emitErrorNT (node:net:1357:8)
    at processTicksAndRejections (node:internal/process/task_queues:83:21) {
  code: 'EACCES',
  errno: -4092,
  syscall: 'listen',
  address: '::',
  port: 7000