caffeine
英 ['k?fi?n]
美['k?fin]
- n. [有化][药] 咖啡因；茶精（兴奋剂）
考试真题
- Caffeine, a substance found in coffee and some soft drinks, is also a drug.
出自-2015年12月听力原文
- The caffeine—the equivalent of two strong cups of coffee, was sufficient to reverse this effect, with some cyclists even displaying increased eye movement speeds.
2017年6月四级真题（第三套）阅读 Section A
- To find out, researchers gave 11 volunteer cyclists a carbohydrate?solution either with a moderate dose of caffeine, ?which is known to stimulate the central nervous system, or as a placebo without, during 3 hours of?cycling.
2017年6月四级真题（第三套）阅读 Section A
- In West Africa, people have long chewed kola nuts as stimulants, because they contain caffeine that also occurs naturally in tea, coffee, and chocolate.
2017年12月六级真题（第一套）阅读 Section C
- So there could be less protein, more sugar and some additives you wouldn't expect, such as caffeine.
2019年12月六级真题（第二套）阅读 Section B