baggage declaration form

例句：

1. 1.Before boarding the plane, passengers must declare their baggage.
   登机前，乘客必须申报他们的行李。
2. 2.The airline requires passengers to complete a baggage declaration form before departure.
   航空公司要求乘客在出发前填写行李声明单。
3. 3.During the flight, the cabin crew will collect all declared baggage for security checks.
   飞行期间，机组人员将收集所有申报的行李进行安全检查。