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IP屬地：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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篤學(xué)獎投稿，標題如：篤學(xué)獎-Topic 1-A11340-Uband精讀。
■phrasal verbs focus on(集中注意力于,把...集中于...上) finds it hard to focus his thoughts on one ...
