Hypogonadism, or lower levels of sex hormones from low gonad activity, is central to a delay in puberty.

性腺功能减退，即由于性腺活性低下而导致的性激素水平不足，是青春期延迟的关键因素。

Earlier modelling of a period of prolonged low solar activity in the 17th and 18th centuries showed similar patterns.

更早以前，对17、18世纪时太阳活动持续不活跃的那段时期所做的模型也体现了同样的结构。

These same individuals also showed remarkably low activity in the parts of the brain associated with depression, fear and anxiety.

这些人的大脑中与抑郁、恐惧和焦虑相关的区域也表现出非常低的活跃度。

Researchers have found that they have relatively low transposon activity.

研究人员发现它们的转座子活性相对较低。

These conditions looked similar to those seen in the past two cold European winters-which occurred at a time of low solar activity.

这些状况和过去的两次发生在欧洲的严冬很相似--那两次严冬都发生在太阳活动频率很低的时候。

Hobgood says in her paper that “low activity DBH would relate to impulsive behaviors while high activity DBH would relate to persistent behaviors.”

Hobgood 在论文里写到低活性的多巴胺-ß-羟化酶跟冲动行为有关，高活性的多巴胺-ß-羟化酶与常态行为有关。

Like, people with BPD often have lower activity in regions of their frontal lobe, as well as lower gray matter volume and density there.

例如，边缘型人格障碍患者额叶区域的活动通常较低，那里的灰质体积和密度也较低。

Less calcium entering the blood is the most common cause and can be due to hypoparathyroidism, or lower levels or lower activity of parathyroid hormone.

钙离子进入血液的量减少是最常见的原因，可能是由于甲状旁腺功能减退或者甲状旁腺激素的量或者活性降低。

We have an obesity problem in this country, and we shouldn't treat low physical activity and eating too many calories as equally responsible for it.

我们国家出现肥胖问题，我们不应该把过少运动，和摄取太多热量相题并论。

You can consider ways to protect yourself when you start seeing these signs coming on, so you might decide to withdraw from the stressful situation or reward yourself with equal amount of low stress activity time.

当您开始看到这些迹象时，您可以考虑采取保护自己的方法，因此您可能会决定摆脱压力状况或奖励自己等量的低压力活动时间。