gate segment

例句：

1. 1. The gates of the castle are guarded by a sentry.
   城堡的大门由一名哨兵看守。
2. 2. The gate to the park is closed at night.
   公园的入口在晚上关闭。
3. 3. The gatekeeper unlocked the gate for us.
   看门人为我们打开了大门。