Passport
01
护照, 旅行证件
a document for traveling between countries
例子
Do n't forget to bring your passport when you travel abroad.
出国旅行时别忘了带护照。
He carries his passport with him at all times when traveling.
他旅行时总是随身携带护照。
02
护照, 钥匙
a thing that helps one achieve something or makes something possible
03
通行证, 通行许可
any authorization to pass or go somewhere
