Hi Yuhuiyao,
No I'm afraid this is not possible.
Why can you not place the DNS entry on a DNS server, and point the clients at the server instead?
If you don't have a DNS server to point them at, you can make a Cisco Router act as a DNS server.
Alternatively you can use a logon script to place entries in the Computers' HOSTS file, but we are getting into computer configuration land here, and this is a Cisco Forum....
Nick