身份证

例句：

1. 1. He needs to present his ID card at the airport check-in counter.
   他在机场值机柜台需要出示身份证。
2. 2. The police officer asked for her ID card to verify her identity.
   警察要求她出示身份证以核实身份。
3. 3. Before entering the conference room, everyone was required to show their ID cards.
   进入会议室前，每个人都被要求出示身份证。