alertness

Artificial bright light after dusk not only enhances alertness, but also delays the production of melatonin, a sleep-inducing hormone.

天黑后的人造强光不仅让人增加警惕性，而且会延迟体内睡眠荷尔蒙褪黑素的生成。

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Showing mental alertness and calculation and resourcefulness.

表现出思想上的机敏、深思熟虑和足智多谋。

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Even mild dehydration can take a toll, decreasing alertness and mental concentration, and contributing to fatigue.

即使是轻微脱水也会造成不利影响，降低警觉性和注意力，导致疲倦。

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Individual deviation in expected behavior causes arousal or alertness in others.

偏离预期的行为会激怒他人或使他人警觉.

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The other half of the brain stays awake at a low level of alertness.

另一半大脑在低水平警戒状态下保持清醒.

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Total sleep deprivation means being kept awake for days or weeks. A long-term sleep debt may cause emotional upset, compromise work performance, weaken memory, alertness, attention as well as judgment. It may also speed up one ’ s ageing process and lead to other types of diseases.

后者则指一个人连续几天或几周不合眼。长期处于睡眠负债的状况中，不但会影响情绪、工作表现、还会减低记忆力、警觉性、注意力和判断力、并且加速老化，甚至引发其它疾病。

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The order urged the armed forces to enhance their alertness.

该项命令敦促武装部队提高警惕.

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Raj: Your ego, identified with and as body, equates alertness with physical movement, physical accomplishing.

瑞吉: 你的小我与身体认同, 总爱把机灵与身体的运作 、 具体的成就划上等号.

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I know him well in that mood of alertness and suspicion.

我对他这种警觉和猜疑的情绪是很熟悉的。

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Signs of caffeine over-stimulation in a baby can be atypical alertness, short sleep sessions, fussiness, and irritability.

对于宝宝而言，咖啡因过量的刺激表现为不典型的警觉，睡眠很少，烦躁和易怒。

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Emily is a Londoner born and bred and, for a woman some years past the allotted span, of a truly remarkable vigour and alertness.

埃米莉生在伦敦长在伦敦，虽已年逾古稀，但实在令人惊讶的是，她仍精力充沛，耳聪目明。

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Produces changes in brain activity associated with decreased alertness;

影响中枢活动，警觉能力下降；

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Elegant and graceful, the whole demeanor is one and inquiring alertness.

气质文雅而优美, 整体行为特征是和谐、好奇且机警.

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Caffeine has long been known to increase alertness and endurance, and a2003 study led by UGA professor Patrick O'Connor found that caffeine reduces thigh pain during moderate-intensity cycling.

咖啡因很早就被用来增加警觉和耐力，乔治亚大学Patrick O'Connor教授领衔的2003年的一项研究发现：咖啡因能减少中等强度骑车引起的大腿肌痛。

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Kevin Gregory, a scientist at the Silicon Valley-based firm alertness solutions – most of whose clients are companies with employees that perform shift work& cited a study he worked on at NASA where pilots on trans-Pacific flights were instructed to nap for 40 minutes.

硅谷咨询顾问公司Alertness Solutions的专家凯文•格雷戈里引用他在美国国家航空航天局（NASA）进行的一项研究称，NASA要求跨太平洋航线的飞行员必须小睡40分钟。

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Alertness, calmness, courage : he could see them all in the youngster's face.

机警, 镇定, 胆量,都摆出在这年青人的脸上.

子夜部分

Our Gini Coefficient has been reached to the international alertness line level.

我国基尼系数已超过了国际警戒线水平.

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The presence of non-task-oriented ideas is a sign of broad interest, concern, and alertness on the part of the employees.

一些非有关部门工作的建议的产生，标志了在部分职工中的广泛兴趣、机智和关心企业的精神素质。

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The warnings given to you previously remain and I exhort vigilance and alertness.

之前给你们的警告依然有效,我恳请你们保持警惕机敏.

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Our body clock, or natural body rhythm, influences our energy and alertness.

我们的生物钟，或者说是生理节奏，会影响我们的精力和灵敏度。

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The general impression is that of power, agility and alertness.

给人的一般印象是力量 、 敏捷和机警.

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The tricky part would be maintaining this alertness and sensitivity without crossing the line into over-reactiveness.

妙招在于维护犬只的高警觉性与敏感性,而又不越过“过度反应”的界线.

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Stimulant: any drug that excites any bodily function; usually one that stimulates the central nervous system, inducing alertness, elevated mood, wakefulness, increased speech and motor activity, and decreased appetite.

兴奋剂：能兴奋机体功能的药物。通常指刺激中枢神经系统的兴奋剂，用于警醒，改善心情，提神消倦，增加言语和运动能力，以及控制食欲。

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Ginseng was reported to have increased energy and mental alertness.

人参可以增进体力和提高精神敏捷性.

词典精选例句

In large acre laser alertness, laser scattered by atmosphere was depended on.

在大面积激光警戒中, 主要是探测被大气散射的光.

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To avoid puffy, bloodshot eyes, dark under-eye circles and a pale washed-out complexion and for peak alertness and energy experts say you need eight hours of sleep a night.

专家们说，人每天的正常睡眠应达到8小时，这样才能保证头脑清醒，精力充沛，避免出现眼睛浮肿、充血，黑眼圈，和面色苍白等现象。

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Increases alertness, stamina, motor learning, and motor performance.

这会增加灵活度、精力、学习力及效能。

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The drug improved mental alertness.

该药有助于提神。

《柯林斯高阶英汉双解学习词典》

As the drive for sleep builds up during the day, it produces midday sleepiness for many people, Dr. Czeisler says. It also causes a surge in alertness that peaks in the late evening, he says.

蔡斯勒称，白天睡眠动力不断增强，导致许多人中午犯困，还会导致警觉清醒程度在傍晚时分急剧上升，达到高峰。

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Microsleeps become extremely dangerous when they occur in situations which demand constant alertness, such as driving a motor vehicle or working with heavy machinery of them, instead believing themselves to have been awake the whole time, or to have temporarily lost focus.

在驾车或重型机械作业等需要高度警醒的工作中出现微睡眠状况是极度危险的。经历过微睡眠状况的人通常都对此毫不察觉，他们以为自己一直处于清醒状态，或者认为自己只是偶尔走神了。

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