to enforce martial law

• 特别戒严

  extraordinary martial law

• 夜间戒严时间

  martial law is in force at night

• 戒严地区

  area under martial law

• 宣布戒严

  announce martial law

• 宣布城市特别戒严

  announce that a city is under extraordinary martial law

• 城内已实行戒严

  martial law in force in a city