yán / jiū / Táng / mò / de / lì / shǐ / duì / lǐ / jiě / Táng / cháo / xīng / shuāi / hěn / zhòng / yào

研究唐末的历史对理解唐朝兴衰很重要。

Studying the history of the late Tang period is important for understanding the rise and fall of the Tang dynasty.