string(384) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%88%97%E4%B8%BE%E7%9B%AE%E5%89%8D%E4%B8%BB%E6%B5%81%E7%9A%84%E8%B7%A8%E5%A2%83%E7%94%B5%E5%95%86%E5%87%BA%E5%8F%A3%E5%B9%B3%E5%8F%B0%2C%E5%B9%B6%E8%AE%A8%E8%AE%BA%E4%BB%96%E4%BB%AC%E7%9A%84%E4%BC%98%E7%BC%BA%E7%82%B9 => Failed to connect to 14.18.46.51 port 38206: Connection refused"
列举目前主流的跨境电商出口平台,并讨论他们的优缺点
