fáng / jiān / lǐ / de / guāng / xiàn / hěn / àn / dàn / , / kàn / bù / qīng / shū / shàng / de / zì / 。

房间里的光线很暗淡，看不清书上的字。

The light in the room is very dim, making it hard to read the words on the book.