Kāfēijiǎn / huì / ràng / yìxiē / rén / wǎnshang / nányǐ / rùshuì / suǒyǐ / bùyí / hē / tài / duō / kāfēi

咖啡碱会让一些人晚上难以入睡，所以不宜喝太多咖啡。

Caffeine can make it hard for some people to sleep at night, so they should not drink too much coffee.