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IP属地：湖南
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Day 2 Phrases&Backgrounds
■phrasal verbs focus on(集中注意力于,把...集中于...上) finds it hard to focus his thoughts on one ...
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笃学奖投稿，标题如：笃学奖-Topic 1-A11340-Uband精读。
■phrasal verbs focus on(集中注意力于,把...集中于...上) finds it hard to focus his thoughts on one ...
