3 sentences

1. 他在研究中引用了大量的史料。

   tā zài yán​jiū zhōng yǐn​yòng le dà​liàng de shǐ​liào.

   He cited a wealth of historical materials in his research.

   Source: Dong Chinese Dictionary

2. 史料对这位历史人物的记载极其不详。

   shǐ​liào duì zhè wèi lì​shǐ rén​wù de jì​zǎi jí​qí bù​xiáng.

   Historical records of this figure are extremely sketchy.

   Source: Dong Chinese Dictionary

3. 据史料记载，那位叛逃的将领最终在边境被追兵所殊。

   jù shǐ​liào jì​zǎi, nà wèi pàn​táo de jiàng​lǐng zuì​zhōng zài biān​jìng bèi zhuī​bīng suǒ shū.

   According to historical records, the defecting general was eventually executed by pursuing troops at the border.

   Source: Dong Chinese Dictionary