从 2025 年开始，所有美国乘客都必须携带新的所需文件才能登机。 Starting 2025, all U.S. flyers must carry a new required document to board flights.

从今年开始，美国的所有乘客在乘飞机旅行时都必须携带特定文件，这标志着航空安全和旅行协议的重大变化。 Starting this year, all flyers in the US must carry a specific document when traveling by air, marking a significant change in aviation security and travel protocols. 该文件的确切性质没有具体说明，但它对于登机至关重要。 The exact nature of the document is not specified, but it is essential for boarding flights. 建议旅客做好相应准备，以避免旅行中断。 Travelers are advised to prepare accordingly to avoid travel disruptions.