域名主机名一眼辨:三招教你秒懂网址玄机,一眼识域名主机,三步解锁网址奥秘
Identify Domain names and Host names at a glance: Three tricks to help you understand the secrets of urls in an instant. Recognize domain names and host names at a glance, and unlock the secrets of urls in three steps
以上为机器翻译结果，长、整句建议使用 人工翻译 。