当我运行命令sudo apt-get -t experimental install phonetisaurus m2m-aligner mitlm libfst-tools我得到以下输出：

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:
  m2m-aligner : Depends: libstdc++6 (>=5.2) but 4.9.2-10 is to be installed
  mitlm : Depends libmitlm0 (= 0.4.1-2) but it is not going to be installed
          Depends: libstdc++6 (>=5.2) but 4.9.2-10 is to be installed
phonetisaurus : Depends: libfst4 (>=1.5.3+r3) but it is not installable
                Depends: libstdc++6 (>=5.2) but 4.9.2-10 is to be installed

尝试直接安装libstdc 6(使用sudo apt-get install libstdc 6或sudo apt-get -f libstdc 6)会让我：

Reading package lists... Done
Building dependency tree
Reading state information... Done
libstdc++6 is already the newest version.
The following packages were automatically installed and are no longer required:
  libboost-atomic1.55.0 libboost-filesystem1.55.0
  libboost-program-options1.55.0 libboost-regex1.55.0 libboost-thread1.55.0
  libcwiid1 libfftw3-single3 libjs-prettify libqscintilla2-11
  libqscintilla2-l10n libqt4-network libqt4-xmlpatterns libqtwebkit4
  libruby1.9.1 libruby1.9.1-dbg libscsynth1 libtcltk-ruby1.9.1 ri1.9.1
  ruby1.9.1 ruby1.9.1-dev ruby1.9.1-examples ruby1.9.1-full ruby1.9.3
  supercollider supercollider-common supercollider-ide supercollider-language
  supercollider-server supercollider-supernova
Use 'apt-get autoremove' to remove them.
0 upgraded,0 newly installed,0 to remove and 82 not upgraded.

试图安装libfst4给了我：

Reading package lists... Done
Building dependency tree
Reading state information... Done
Package libfst4 is not available,but is referred to by another package.
This may mean that the package is missing,has been obsoleted,or
is only available from another source

E: Package 'libfst4' has no installation candidate

并尝试安装libmitlm0给了我：

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:
 libmitlm0 : Depends: libstdc++6 (>= 5.2) but 4.9.2-10 is to be installed
E: Unable to correct problems,you have held broken packages.

我觉得这里有一些我想念的东西,但经过一天的捣乱之后,我仍然无法理解.任何帮助/见解将不胜感激.