我注意到，每当我在命令行中尝试 spd-say 时，它总是在启动后不久停止，并且没有完成我告诉它说的内容。
例如，
spd-say "moo moo farms are the best cow farms ever. They say moo, they don't pollute the earth, and they give milk. Visit moo moo farms today for only twelve easy payments of seventeen ninety five weekly!"
只会说moo moo farms are the best cow farms. They say moo, they don't pollute the earth, and they gi；然后它会切断。
谁能告诉我这里发生了什么？我在 Aspire 5610Z 上使用 Linux Mint 19.0，在 Optiplex 755 上使用 Linux Ubuntu 18.04。
我想重新安装 APT Tool，所以我卸载了它，然后我意识到如果我只是删除/etc/apt目录可能会更好。有什么办法可以解决我的错误吗？
我的 Ubuntu 版本是 18.04.2 LTS，输出ls /etc/apt是
root@user-OptiPlex-755:~# ls /etc/apt
ls: cannot access '/etc/apt': No such file or directory
更新：我已经重新安装apt，但是，这是我的输出：
root@user-OptiPlex-755:~# sudo apt install --reinstall apt-utils ubuntu-minimal ubuntu-release-upgrader-gtk ubuntu-desktop update-manager update-notifier update-notifier-common
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package update-manager 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
However the following packages replace it:
ubuntu-release-upgrader-core update-manager-core
Package update-notifier-common 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
Package update-notifier 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
However the following packages replace it:
update-notifier-common
Package apt-utils 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
However the following packages replace it:
apt
Package ubuntu-release-upgrader-gtk 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 'apt-utils' has no installation candidate
E: Unable to locate package ubuntu-minimal
E: Package 'ubuntu-release-upgrader-gtk' has no installation candidate
E: Unable to locate package ubuntu-desktop
E: Package 'update-manager' has no installation candidate
E: Package 'update-notifier' has no installation candidate
E: Package 'update-notifier-common' has no installation candidate`