请您拿出随身物品，并通过金属探测器/安检门。
Please set down your belongings and step through the metal detector/security gate.
安检门是一块金属条或一扇门，它可以阻止汽车和人们进入某个区域，除非他们获得了允许可以进入该区域。
A "security gate" is a metal bar or a door that goes across a road and stops cars and people from entering an area unless they have permission to do so.
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