install google-chrome in ubuntu 11.10

today I reinstalled the OS in my PC

and I found that I cant install google-chrome in that

after nearly 2h,,I have the following solution

it says that  "google-chrome-stable 相依於 libnss3-1d (>= 3.12.3)﹔然而：
  未曾安裝套件 `libnss3-1d'。"

so,,I try to "sudo apt-get install libnss3-1d"

and it said "libnss3-1d : Depends: libnss3 (= 3.12.9+ckbi-1.82-0ubuntu4) 但 3.12.9+ckbi-1.82-0ubuntu6 卻將被安裝"

so I use the "sudo aptitude install libnss3" to Downgrade the version

and then retype the "sudo apt-get install libnss3-1d" and use "dpkg -i"

to install the chrome package