攻读,钻研;

Before trying to tackle his homework he read up the notes he had taken at the lecture.
他把课堂上记的笔记认真看过后才动手做作业.
来源:《简明英汉词典》I shall have to read up on this subject if I am to give a talk about it.
如果我准备做一次关于这课题的讲座,我就必须把它彻底研究一番.
来源:《简明英汉词典》
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