便门

例句：

1. 1. The convenience of this door makes it a popular choice.
   这扇门的便利性使它成为一个受欢迎的选择。
2. 2.He opened the door and stepped out into the fresh air.
   他打开门，走到外面呼吸新鲜空气。
3. 3. After the meeting, they left the door open for privacy.
   会议结束后，他们让门开着以便保持隐私。