This is like your bag's passport number if you like.

这就像你的行李护照号码。

20,000 users have been affected by a targeted attack seeking passport numbers.

两万名用户受到了谋求护照号的针对性攻击的影响。

May I see your passport? ... So, your passport number is BEL 120426.

我可以看看你的护照吗？ ...所以，您的护照号码是 BEL 120426。

Okay. I'm planning to steal Irina's passport number.

我准备去查查艾瑞娜的护照号。

It’s sensible to keep a note of your passport number.

【sensible】把你的护照号码记下来是明智的。