to say nothing of ...

phr

• ① 更不要说;更不待言(★一般用both ... and或as well as)
  • She can speak Russian and Spanish, to say nothing of English.她会说俄语和西班牙语,英语是更不用说了。
  • He doesn't even drink beer, to say nothing of vodka.他连啤酒都不喝,更不要说是伏特加酒(★其他同义的词组有not to mention; not to speak of; let alone; apart from等)。