to block

• 封锁边境

  close a border

• 封锁道路

  close a road

• 封锁港口

  blockade a port

• 封锁交通

  block traffic

• 封锁火道

  block the path of the fire

• 封锁新闻

  black out the news

• 封锁消息

  block the passage of information

• 封锁技术秘密

  seal up technical secrets

• 地区封锁

  regional blockade

• 军事封锁

  military blockade

• 宣布封锁

  announce a blockade

• 冲破封锁

  run a blockade

• 解除封锁

  lift a blockade

• 把敌人的舰队封锁在港里

  blockade the enemy fleet in the harbour

• 车站一带被封锁了。

  The station area has been blockaded.