gate change

例句：

1. 1. The gatekeeper opened the gate for us.
   看门人为我们打开了大门。
2. 2. The gates of hell are wide open.
   地狱的门敞开了。
3. 3. The gates of the palace were guarded by fierce guards.
   宫殿的大门由凶猛的卫兵把守。