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在睡眠进行的一定阶段的时候，生长类的激素就会上升。
It's known that levels of growth hormone rise during certain stages of sleep.
youdao
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褪黑激素开始上升通常在上床睡觉的大约两个小时之前。
Melatonin levels normally start to rise about two hours before bedtime.
youdao
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褪黑激素开始上升通常在上床睡觉的大约两个小时之前。
Melatonin levels normally start to rise about two hours before bedtime.
youdao