这些古代文献为我们了解当时的社会提供了重要线索。

Zhèxiē gǔdài wénxiàn wèi wǒmen liǎojiě dāngshí de shèhuì tígōng le zhòngyào xiànsuǒ.

These ancient documents provide important clues for us to understand the society of that time.

图书馆正在进行文献数字化工作，方便大家在线查阅。

Túshūguǎn zhèngzài jìnxíng wénxiàn shùzìhuà gōngzuò, fāngbiàn dàjiā zàixiàn cháyuè.

The library is digitizing documents to make it convenient for everyone to consult them online.

写论文之前，一定要查清楚最新的研究文献。

Xiě lùnwén zhīqián, yídìng yào chá qīngchu zuìxīn de yánjiū wénxiàn.

Before writing a thesis, you must carefully check the latest research literature.