wget无法在不同的域中找到文件

Question

我正在使用wget使用递归选项（-r）下载文件并启用递归以转到其他域（-H）。当它找不到某个文件时，wget就会继续尝试

--2013-05-05 13:38:52--  http://clnet.ucla.edu/robots.txt
Resolving clnet.ucla.edu... 128.97.168.150
Connecting to clnet.ucla.edu|128.97.168.150|:80... failed: Connection timed out.
Retrying.

--2013-05-05 13:39:14--  (try: 2)  http://clnet.ucla.edu/robots.txt
Connecting to clnet.ucla.edu|128.97.168.150|:80... failed: Connection timed out.
Retrying.

向下试试10，依此类推。有没有办法告诉wget只是忽略这个文件？