language-support-translations-zh depends on thunderbird-locale-zh-(cn|tw). They depend on thunderbird OR language-support-zh, so language-support-zh itself satisfies the dependency.
Which package are you installing to get Chinese language support, and which program (apt-get, aptitude, synaptic... are you using to install it)?
language- support- translations- zh depends on thunderbird- locale- zh-(cn| tw). They depend on thunderbird OR language- support- zh, so language-support-zh itself satisfies the dependency.
Which package are you installing to get Chinese language support, and which program (apt-get, aptitude, synaptic... are you using to install it)?