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  •   你查询的单词是:concentration ([ ˌkɔnsen'treiʃən ]
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  •   解释: n. 集中,专心,浓度
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  •   例子: 1. Stress and tiredness often result in a lack of concentration.
       紧张和疲劳常使人精神不集中。
    2. I found it hard to keep my concentration with such a noise going on.
       吵闹声不绝于耳,我很难保持精神集中。
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