In other words, 66% of adults are living in a perpetual state of drowsiness.

换句话说，66% 的成年人长期生活在昏昏欲睡的状。

A change from alpha wave drowsiness to lower frequency theta brain waves signify early sleep.

从α波睡意到较低频率的脑电波的变化表示早睡。

However, medications must be used with caution as they can also cause drowsiness or impair concentration.

不过，使用药物时一定要谨慎，因为有可能会引起嗜睡或影响注意力。

She was sitting bolt upright in her chair, her fists clenched upon its arms, every trace of drowsiness gone.

她笔直地坐在椅子上，两个拳头捏得紧紧的抱在怀里，睡意消失得无影无踪。

Under normal circumstances, adenosine triggers these receptors and it produces a feeling of relaxation and even drowsiness for some people.

在正常情况下，腺苷会触发这受体，让一人产生放松甚至困倦的感觉。

Adenosine slows down nerve impulses in the brain, causing drowsiness as it depresses the central nervous system in the process.

腺苷会减慢大脑的神经冲动，在这一过程抑制枢神经系统，由此使人昏昏欲睡。

Cars must also have advanced emergency braking, a built-in data recorder, drowsiness and distraction monitoring, and sensors to help when reversing.

车辆还必须安装先进的紧急制动、内置数据记录器、疲劳和注意力分散检测以及帮助倒档的感应器。

Each night he added to the pattern of his fancies until drowsiness closed down upon some vivid scene with an oblivious embrace.

他都给他那幻想的图案添枝加叶，一直等到昏沉的睡意降落在一个生动的场面之上，使他忘记了一切。

I tried to fight off this drowsiness. It was impossible. My breathing grew weaker. I felt a mortal chill freeze my dull, nearly paralyzed limbs.

我要抗拒睡眠，两眼睁着。但不可能，我的呼吸逐渐细微了。我觉得一种厉害的冰冷冻住了我的沉重肢体，像瘫痪了的一样。

Narcolepsy is a sleep disorder where people have overwhelming daytime drowsiness, leading to them to fall asleep anywhere, at any time, during any activity.

嗜睡症是一种睡眠障碍，人们在白天会有强烈的睡意，导致他们在任何时间、任何地点、任何活动睡着。

Those changes can lead to the headache, drowsiness, and decreased alertness reported by people who get rid of their morning coffee which can last anywhere from two days to a couple weeks.

这改变可能导致头痛、疲劳，或者是那正摆脱晨间咖啡的人所说的警惕性下降，这症状会出现在任何地方并且持续两天至几周。