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，腺苷会触发这些受体，让些人产生放松甚至困倦的感觉。

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

句话说，66% 的成年人长期生活在昏昏欲睡的状态中。

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。

And finally, hypertensive emergency may involve symptoms like confusion, drowsiness, chest pain, and breathlessness.

最后，高血压急症会出现些症状，像是意识不清、昏昏欲睡、胸痛与呼吸困难。

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.

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

However, caffeine has a similar molecular structure to adenosine and, like a car cutting the queue at a drive-through, it binds to the neurons before the adenosine gets the chance, preventing these feelings of drowsiness.

然而，咖啡因的分子构与腺苷相似，就像辆车在得来速通道插队样，它会在腺苷之前与神经元合，阻止困倦感的产生。

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。我觉得种厉害的冰冷冻住我的沉重肢体，像瘫痪的样。

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

每夜他都给他那些幻想的图案添枝加叶，直等到昏沉的睡意降落在个生动的场面之上，使他忘切。

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、内置数据录器、疲劳和注意力分散检测以及帮助倒档的感应器。

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

腺苷会减慢大脑中的神经冲动，在这过程中抑制中枢神经系统，由此使人昏昏欲睡。

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。

This could lead to anything from " dizziness, drowsiness and headaches" to liver damage and even cancer.

这些质可能会导致“头晕，嗜睡和头痛“导致肝损伤甚至癌症。

More often than not, it's a combination of factors that leads to night time awakenings and daytime drowsiness.

夜间失眠及晨间昏昏欲睡往往都是由多种因素造成的。

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

不过，使用药时定要谨慎，因为有可能会引起嗜睡或影响注意力。

Some days you'll experience drowsiness, nausea.

你会有时想睡觉还有反胃。

Five of the cars were carrying vinyl chloride, a colorless gas used in making plastic products that can cause dizziness, headaches and drowsiness when inhaled in the short term and a rare form of liver cancer after chronic exposure.

其中五节车厢携带氯乙烯，这是种无色气体，用于制造塑料产品，短期吸入会导致头晕、头痛和嗜睡，长期接触会导致种罕见的肝癌。

Professor Binns, their ghost teacher, had a wheezy, droning voice that was almost guaranteed to cause severe drowsiness within ten minutes, five in warm weather.

他们的鬼魂老师宾斯先生说起话来呼哧带喘，拖腔拖调，几乎肯定能在十分钟内使人昏昏欲睡；如果天气炎热，五分钟就够。

It says that it may cause drowsiness or dizziness.

它说明可能会引起嗜睡或头晕。

You could add sore eyes, dropsy, gout, scurvy, drowsiness.

你可以再加上眼痛、水肿、痛风、坏血病、嗜睡等症状。

The boy read and nodded and fought against drowsiness.

男孩读着，点点头，与睡意作斗争。