我正在使用 Ubuntu 11.04，并且正在尝试安装 TortoiseHg。我已经应用了 TortoiseHg 网站上的 PPA，所以apt-get实际上可以找到它。但是每当我输入时sudo apt-get tortoisehg，我都会得到这个：
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:
tortoisehg : …