It is a well-known fact that caffeine is a stimulant.
咖啡因是兴奋剂，这是人所共知的事实。
Theophylline, a close structural relative of caffeine and the major stimulant in tea, was one of the most effective compounds in both regards.
茶碱是咖啡因的近亲，也是茶中的主要兴奋剂，它在这两方面都是最有效的化合物之一。
Caffeine, the stimulant in coffee, has been called "the most widely used psychoactive substance on Earth".
咖啡中的咖啡因因被称为“地球上使用最广泛的精神活性物质”。
It is used in medicine for its stimulant quality.
由于它有兴奋剂的特性而被应用于医学。
Wait. Nicotine is a STIMULANT.
等一下，尼古丁是一种兴奋剂。
It is well known that caffeine is a stimulant.
众所周知，咖啡是一种兴奋剂。
It is psychoactive, a stimulant and addictive.
它作用于人的神经系统，是一种兴奋剂，让人上瘾。
Coffee is a stimulant. Alcohol is a depressant.
咖啡是种兴奋剂，而酒精是种抑制剂。
Nicotine is both a stimulant and a depressant.
尼古丁既是一种兴奋剂也是一种镇定剂。
Also, the nicotine in cigarettes is a stimulant.
此外，香烟中的尼古丁也有刺激性。
It's a respiratory stimulant, mostly used in wound care.
它还能调节呼吸系统，主要用来治疗外伤。
I only know a stimulant, a salty stimulant, it's called sweat.
我只知道一种兴奋剂，一种咸味的兴奋剂，它叫汗水。
Mixed together, the stimulant and the depressant do not cancel each other out.
将两者混合，它们所具有的兴奋剂和镇静剂的效用并不会彼此抵消。
As a stimulant it will keep you awake, even if used nearly six hours before bed.
作为兴奋剂它会让你保持清醒，即使差不多是在睡觉前6个小时。
ADHD is often partly treated with a stimulant (Ritalin), along with behaviour therapy.
注意力不足过动症常常用兴奋剂(利他林)来治疗，同时伴以行为疗法。
Cheese contains tyramine, which has been shown to increase brain-stimulant activity.
而奶酪中含有酪胺，这种成分已被证明能提高大脑兴奋度。
There are some concerns that stimulant medications can be abused by people who don't need them.
有些人担心不需要兴奋剂药物治疗的人可能会滥用药物。
In a sample of middle- and high school students, the illicit useof stimulant medication was 4.5 percent.
中学生和高中生样本中非法服用兴奋剂的比例是百分之四点五。
Nicotine is another common stimulant; you should quit or make your last cigarette of the day well before bed.
尼古丁是另一种常见的刺激物，你最好戒烟否则就在睡前几小时停烟。
The analysis found a significant association between sudden unexplained death and the use of a stimulant at the time of death.
研究分析发现死时在原因不明的猝死和兴奋剂的使用上存在显著相关。
In the U.S., nearly 3% of kids now takes a stimulant like Ritalin; the figure is now 2.4% in Australia and 2.5% in Israel.
在美国，目前有几近3%的孩子在服用瑞他林一类刺激性药物；在奥大利亚，这个数字是2.4%、以色列是2.5%。
A mixture similar to the protein content of egg whites activated these cells, triggering the release of the stimulant orexin.
一种与蛋清中所含的蛋白质相类似的混合物质激活了这些脑细胞，引发了使人兴奋的促食素大量释放。
Pediatric stimulant use has been slowly but steadily increasing since 1996, primarily as a result of greater use among adolescents.
儿科兴奋剂的使用从1996年开始呈稳健地增长趋势，其中，主要是运用于青少年。
They found that sugar ACTS as a stimulant that switches on normal bacterial responses, rendering the bugs vulnerable to antibiotic attack.
他们发现糖就像兴奋剂一样，让细菌的正常反应得以恢复，从而使它们对抗生素的攻击更为敏感。
And the Yemeni habit of chewing a leaf called qat, a mild stimulant not conducive to clear thinking or dynamism, is almost as pervasive as ever.
也门人习惯咀嚼一种叫跨特的树叶，这种树叶是温和的兴奋剂，对清晰的思考和力本说没有助益，这个习惯几乎和以往一样普遍。
The boy was already taking stimulant ADHD medication, and the extra caffeine in principle might have pushed him over the edge, according to Benjamin.
本杰明称，小男孩现正在服用药物，治疗兴奋剂引起的多动症（ADHD）。 由于摄入了过量的咖啡因，才使他出现这种症状。
The ventral tegmental area is a clump of cells that make dopamine, a natural stimulant, and sends it out to many brain regions [when one is in love].
当人恋爱时，腹侧盖膜区的细胞会产生天然兴奋剂多巴胺，并把它传输到多个脑区。
For centuries, people who live in the high Andes have chewed coca leaves, whose alkaloids act as a mild stimulant and help to ward off cold and hunger.
几百年来，居住在安地斯高山上的居民喜爱嚼食古柯叶，其中的生物碱成分是一种温和的兴奋剂，有助于抵抗寒冷和饥饿。
As a stimulant, caffeine jazzes up your whole body, increasing blood pressure, heart rate and in some cases, causing heart palpitations and an irregular heartbeat.
做为一种兴奋剂，咖啡因让你全身活跃，血压和心跳升高，在某些例子中导致心悸和心率不齐。
As a stimulant, caffeine jazzes up your whole body, increasing blood pressure, heart rate and in some cases, causing heart palpitations and an irregular heartbeat.
做为一种兴奋剂，咖啡因让你全身活跃，血压和心跳升高，在某些例子中导致心悸和心率不齐。
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