caffeine
caffeine 英 [ˈkæfi:n] 美 [kæˈfin, ˈkæfˌin, ˈkæfiɪn]
n. [有化][药] 咖啡因；茶精（兴奋剂）
名词复数:caffeines
- Good morning! Caffeine keeps you awake! It’s that zippy chemical found in coffee, tea, and sodas. In fact, it comes from the German word for “coffee.”
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- n. [有化][药] 咖啡因；茶精（兴奋剂）
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1. But you can get other benefits from coffee that have nothing to do with caffeine.
但是你可以从咖啡中或许与咖啡因无关的其他好处。
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2. I gotta have some caffeine.
我需要一点咖啡因。
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3. And, of course if you have sleep problems, caffeine should be cut out.
而且，假如你有睡眠问题的话，你就更不应该继续饮用咖啡因饮料。
- caffeine (n.) trimethyl-derivative of xanthine, 1830, from German Kaffein, coined by chemist F.F. Runge (1795-1867), apparently from German Kaffee "coffee" (see coffee) + chemical suffix -ine (2) (German -in). So called because the alkaloid was found in coffee beans; its presence accounts for the stimulating effect of coffee and tea. The form of the English word may be via French caféine. Related: Caffeinic.
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