名词
中文翻译：Unknown
同义词：
['focus', 'concentration', 'concentration of poisons']
例句：
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1. The scientist needs to concentrate on the experiment.
科学家需要集中精力做实验。
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2.The medicine is meant to help you concentrate better.
这药是为了帮助你更好地集中注意力。
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3.The teacher asked us to concentrate on our work during the break.
老师让我们在休息时间专心工作。