1 sentence

1. 咖啡有提神醒脑的效果，因为其中含有咖啡因。

   kā​fēi yǒu tí​shén​xǐng​nǎo de xiào​guǒ, yīn​wèi qí​zhōng hán​yǒu kā​fēi​yīn.

   Coffee has a refreshing effect because it contains caffeine.

   Source: CCMatrix