gate dog

例句：

1. 1. The gate is closed, so no one can enter.
   大门关闭了，没有人能进入。
2. 2. He walked through the gate and into the garden.
   他穿过大门走进了花园。
3. 3. The gatekeeper was very strict about keeping the visitors out.
   看门人非常严格地阻止访客进入。