名词
中文翻译：脑疲劳
同义词：
['brain fatigue', 'mental fatigue', 'mental exhaustion']
例句：
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1. After a long day at work, I felt a bit of brain fag.
工作了一整天后，我感到有点脑疲劳。
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2.He was so tired that he couldn't concentrate on the task anymore.
他太累了，无法再集中注意力完成这项任务。
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3. The marathon runners were all suffering from brain fag after the race.
马拉松跑者在比赛后都遭受了脑疲劳。