string(292) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%B1%86%E8%8A%BD%E7%9A%84%E7%94%9F%E9%95%BF%E8%BF%87%E7%A8%8B%E6%B3%A8%E6%84%8F%E4%BA%8B%E9%A1%B9%E6%98%AF%E4%BB%80%E4%B9%88 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
豆芽的生长过程注意事项是什么
