abbr.humanitarian reasons 人道主义的理由；v.发出嗡嗡声，哼唱( hum的第三人称单数 )；忙碌，活跃； 英英释义： humn.the state of being or appearing to be actively engaged in an activity"there is a constant hum of military preparation"同义词：busynessan Islamic fundamentalist group in Pakistan that