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汉语拼音：kā fēi yīn

有机化合物，化学式C8H10O2N4·H2O。白色有光泽的柱状晶体，有苦味。多含在咖啡、可可的种子和茶叶中。可做中枢兴奋药和利尿药等。也叫咖啡碱。[英caffeine]

• Decaffeinated coffee still contains some stimulants and other nasties linked with cancer.

  脱咖啡因的咖啡仍含一些刺激物和其他可能致癌的有害物质。

• As little as 50mg of caffeine can produce pharmacological effects.

  仅仅50毫克的咖啡因就能产生药理效果。

• The caffeine in coffee can jangle the nerves.

  咖啡中的咖啡因会使神经紧张。

• Caffeine can cause palpitations and headaches.

  咖啡因会引起心悸和头痛。

• Decaffeinated coffee is an acquired taste.

  喝脱去咖啡因的咖啡是慢慢养成的嗜好.

• As a rule of thumb, a cup of filter coffee contains about 80mg of caffeine.

  凭经验估计，一杯过滤咖啡约含80毫克咖啡因。

• The shaking inside may be due to low blood sugar, too much caffeine or too many cigarettes.

  心悸可能是由于低血糖、咖啡因过量或抽烟过多。

• Caffeine is bad for your health.

  咖啡因对人体健康有害。

• Caffeine is the active constituent of drinks such as tea and coffee.

  咖啡因是茶、咖啡之类饮品中的活性成分。

• Caffeine is found in tea, coffee, chocolate, and many other common foods.

  茶 、 咖啡 、 巧克力和许多其他的普通食物中都含有咖啡因.

• Caffeine makes some people feel nervous.

  咖啡因会使一些人感到情绪激动.

• Now there are cola drinks without caffeine.

  现在也有不含咖啡因的可乐类饮料.

• Cola nuts have caffeine in them.

  它含有咖啡因.

• It is a substance called caffeine.

  这种物质就是咖啡因.

• Coffee, tea and chocolate have caffeine too.

  咖啡 、 茶和巧克力也都含有咖啡因.