尝试通过 Ubuntu 软件中心安装某些应用程序时，出现错误：
cannot install libfreetype6:i386
所以我尝试通过终端安装它，得到了这个结果：
bfalcon@lappy:~$ sudo apt-get install libfreetype6:i386
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
gnome-keyring : Depends: …