The average length of a woman's menstrual cycle is 28 days.
妇女的平均月经周期是28天。
《牛津词典》
2
"If your cyclelength is shorter than 24 hours, you need evening light to keep you synchronized," Duffy says.
如果你的周期长度小于24小时，你就会需要晚上睡得晚来保持同步。“Duffy说。”
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"What we found was that the cyclelength of the biological clock in women was shorter on average than it was in men," says Jeanne Duffy, a study author. "the average difference was about six minutes."