hammer away at 1. 努力做，不懈地致力于 He hammered away at mathematics. 他刻苦钻研数学。 2. 反复强调，不断重复 hammer away at the need to do sth. 反复强调做某事的必要性 3. 向…反复强调；向…不断要求 hammer away at David trying to change his mind 反复做戴维的工作试图改变他的主意 The little child was hammering away at his mother to let him play outdoors. 小孩再三恳求母亲让他到外面玩耍。 4. 频频攻击 hammer away at the enemy troops 向敌军频频发起攻击