我运行了下面的代码，得到这个包需要这些包，现在它也说这些包是建议的，这些是推荐的。我该如何安装它们。
myusuf3@purple:/etc$ sudo apt-get install virtualbox-4.0
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
acroread ia32-libs lib32asound2 lib32bz2-1.0 lib32gcc1 lib32ncurses5 lib32stdc++6 lib32v4l-0 lib32z1 libaudio2
libc6-i386 libcurl3 libflac8 libhal1 liblcms1 libmng1 libogg0 libpulse0 libqt4-dbus libqt4-network libqt4-opengl
libqt4-xml libqtcore4 libqtgui4 libsdl-ttf2.0-0 libsdl1.2debian libsdl1.2debian-alsa libsndfile1 libv4l-0
libvorbis0a libvorbisenc2 libx11-xcb1 nspluginwrapper
Suggested packages:
libldap2 libgnome-speech7 lib32asound2-plugins nas liblcms-utils pulseaudio qt4-qtconfig
Recommended packages:
pdf-viewer
The following NEW packages will be installed:
acroread ia32-libs lib32asound2 lib32bz2-1.0 …apt ×1