5 sentences

1. 咖啡因或许对你有好处。

   kā​fēi​yīn huò​xǔ duì nǐ yǒu hǎo​chu.

   Caffeine might be good for you.

   Source: OpenSubtitles

2. ‎糖和咖啡因有什么问题吗？

   ‎ táng hé kā​fēi​yīn yǒu shén​me wèn​tí ma?

   What's wrong with sugar and caffeine?

   Source: OpenSubtitles

3. 我需要咖啡因。

   wǒ xū​yào kā​fēi​yīn.

   I need caffeine.

   Source: OpenSubtitles

4. 咖啡因是一种中枢神经系统兴奋剂。

   kā​fēi​yīn shì yī zhǒng zhōng​shū shén​jīng xì​tǒng xīng​fèn​jì.

   Caffeine is a central nervous system stimulant.

   Source: Dong Chinese Dictionary

5. 咖啡中含有大量的咖啡因，可以提神醒脑。

   kā​fēi zhōng hán​yǒu dà​liàng de kā​fēi​yīn, kě​yǐ tí​shén xǐng​nǎo.

   Coffee contains a lot of caffeine, which can help refresh the mind.

   Source: Dong Chinese Dictionary