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。
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.
本研究开发的碱式氯化镁晶须具有原料廉价易得、合成条件温和以及操作简单的特点。
The basic magnesium chloride whisker that is synthesized in this experiment has the character of the low cost, the mild conditions and easy operation.
咖啡因一种苦味的白色生物碱，C8H10N4O2，通常得自咖啡或茶，在药品中主要作为温和兴奋剂及治疗特定的头痛病。
A bitter white alkaloid, C8H10N4O2, often derived from tea or coffee and used in medicine chiefly as a mild stimulant and to treat certain kinds of headache.
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