an official document containing personal information and usually a photograph that allows a person to travel to foreign countries and to prove who they are

Many refugees have arrived at the border without passports. 许多难民到达边境时身上没有护照。

He was a German, travelling on a Swiss passport. 他是个德国人，持瑞士护照旅行。

passport control (= the examining of travellers' passports) 护照检查

a passport photo 护照像片

a certain way of getting something you want

Many students opt for business studies simply because it sounds like a passport to a good job. 许多学生选择学商科仅仅是因为它似乎是找到好工作的一种手段。

Beauty alone can be a passport to success. 人们单凭美貌也可能获得成功。

He saw the deal as his passport to prosperity.

Learning to drive was my passport to freedom.

We need to make these kids realize that education is the passport to a fulfilling life.