1·Musk is used for perfumes and stimulant.
麝香被用作香料和兴奋剂。
—— 《新英汉大辞典》
2·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。
3·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。
4·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。
5·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。
1·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。
2·Research has supported the idea that caffeine, a natural stimulant, Narrows blood vessels by blocking the effects of a hormone called adenosine, which normally keeps them widened.
这一新的研究成果对下面这一理论表示支持，即咖啡因这种天然的刺激物会防碍一种被称为腺苷(adenosine)的激素发挥作用，从而使血管变得狭窄。腺苷的作用则是让血管保持宽敞。
3·In our country we received these in the letter, but never sought to make practical use of them, employing them only as a stimulant to incite ourselves to moral revolt.
而在我们国家，文学上是接受了这些思想，但从不寻求在实践中运用它，我们只把它当作刺激物，来煽动我们作道德上的反抗。
4·As far as FLEX is concerned, the only problem with coffee consumption is that it can inhibit sleep for people who are sensitive to its stimulant effects.
至于FLEX所担心的唯一问题就是对于咖啡中的刺激物过于敏感的人群来说，饮用咖啡会导致他们的难以入睡。
5·It's important to keep in mind that caffeine is a stimulant that can increase your heart rate and blood pressure, interrupt your sleep, and cause nervousness and irritability.
重要的是，要记住咖啡因是一种刺激物，它会加快你的心跳和血压，影响你的睡眠，造成神经过敏和神经兴奋。