shell:$ nslookup -timeout=2 -retry=1 'douban.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	douban.com
Address: 120.53.130.158
Name:	douban.com
Address: 140.143.177.206
Name:	douban.com
Address: 81.70.124.99