zhè / bù / gǔ / jí / nèi / róng / tán / ào / chū / xué / zhě / hěn / nán / yí / xià / zi / dú / dǒng

这部古籍内容潭奥，初学者很难一下子读懂。

This ancient book is profound and difficult for beginners to understand at once.