passport是什么意思啊

passport英音：['pɑ:s,pɔ:t]美音：['pæs,port]
1.护照;通行证;执照
A person who travels abroad must carry a passport.
出国旅行要携带护照.
2.(达到目的的)手段[S1][(+to)]
What is the passport to happiness?
得到幸福的手段是什么?
祝你开心!