Harlow says that he too has listened to hibernating bear hearts going still for a stretch and then kerthumping arrhythmically.

哈洛称他也听见过冬眠中的黑熊心率在长时间的静止之后没有节奏的跳动起来。

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Third, the child with bipolar disorder often has a daily variation: he becomes highly active at night and in the morning he is like a hibernating bear, all but impossible to get out of bed.

NPR: Excerpt: 'Delivered from Distraction'