警卫队

例句：

1. 1. The guards at the gate were very alert.
   门口的警卫非常警觉。
2. 2. He is a good guard for his company's secrets.
   他是一个很好的公司秘密的守护者。
3. 3. The guards were ordered to stand by the door.
   警卫被命令站在门口。