certificate of nationality

例句：

1. 1.He applied for a passport to travel abroad.
   他申请了护照以便出国旅行。
2. 2.The passport is valid until the end of this year.
   护照有效期至本年度末。
3. 3. The passport holder must present it at the airport when checking in.
   在办理登机手续时，护照持有人必须出示它。