jiè bèi sēn yán de jiān 
nínshìfǒuzàixúnqiú:戒备戒备森严戒备森严的监狱戒备 戒备森严 戒备森严的监狱gèngduōjiéguǒ...
yīngwénjièshì:
  1. n.  a high security prison, ie for dangerous criminals