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。