| 英语单词 | caffeine |
|---|---|
| 英美音标 | 英 ['kæfiːn] 美 ['kæfiːn] |
| 中文释义 | n.咖啡因 |
| 英语例句 | (1) Now there are cola drinks without caffeine. (2) I'm trying to cut down on sugar and caffeine. (3) Caffeine makes people nervous and unsleeping. |
| 中文例句 | (1) 现在也有不含咖啡因的可乐类饮料。 (2) 我决定减少对糖和咖啡因的摄取量。 (3) 咖啡因是人们紧张和难以入睡。 |
| vocabulary简明 | 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.” |
| vocabulary扩展 | Caffeine is a chemical found naturally in the seeds of some fruits and nuts, like coffee beans and kola nuts. It’s a stimulant, so it makes people feel alert. People love to start their mornings with coffee to help them perk up for the day. The word comes from the German Kaffein, coined in 1830 by a chemist who combined the word for "coffee," Kaffee, with -in, a German chemical suffix. |
| 柯林斯解释 | 1 [N-UNCOUNT 不可数名词]咖啡因;咖啡碱 Caffeine is a chemical substance found in coffee, tea, and cocoa, which affects your brain and body and makes you more active. |
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