短语动词
中文翻译：Unknown
同义词：
['pound', 'hammer away at例句：1. The author pounded away at the topic for hours.（作者猛烈抨击这个话题几个小时。）2. The teacher pounded away at the lesson until it was clear to everyone.（老师猛烈抨击课程直到每个人都明白了。）']
例句：
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1. The author pounded away at the topic for hours.
作者猛烈抨击这个话题几个小时。
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2. The teacher pounded away at the lesson until it was clear to everyone.
老师猛烈抨击课程直到每个人都明白了。
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3.The writer pounded away at his keyboard with increasing speed.
作家以越来越快的速度敲打着键盘。