| 单词 | Ultradian Cycles |
| 释义 | Ultradian Cycles《英文msh词典》Ultradian Cycles [同义词] Ultradian Cycles [主题词] Activity Cycles [中文释义] 超日周期 [英文释义] Bouts of physical irritability or movement alternating with periods of quiescence. It includes biochemical activity and hormonal activity which may be cellular. These cycles are shorter than 24 hours and include sleep-wakefulness cycles and the periodic activation of the digestive system. |
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