string(283) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%AD%E5%9B%BD%E7%9A%84%E4%B8%89%E5%A4%A7%E6%B5%B7%E5%B3%A1%E6%8C%87%E7%9A%84%E6%98%AF%E5%93%AA%E4%B8%89%E4%B8%AA => Failed to connect to 14.18.117.71 port 38069: Connection refused"
中国的三大海峡指的是哪三个
