caffeine

🇬🇧/ˈkæfiːn/ 🇺🇸/kæˈfiːn/
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Caffeine is a chemical substance found in coffee, tea, and cocoa, which affects your brain and body and makes you more active. 咖啡因

noun [物质名词] [有化][药] 咖啡因;茶精(兴奋剂)

Tea contains caffeine. It's bad for your health. 茶含有咖啡因,对你的健康不利。

caffeine 出现在下面的课文中(提供视频、音频及笔记等可系统性学习)
Lesson 041&42 Penny’s bag caffeine 名词: 咖啡因
单词造句:
网友用 “Caffeine” 造句精选
It is a well-known fact that caffeine is a stimulant. 咖啡因是兴奋剂,这是人所共知的事实。
Caffeine can cause palpitations and headaches. 咖啡因能引起心悸和头痛。