2 sentences

1. 这项研究填补了该学术领域的空白。

   zhè xiàng yán​jiū tián​bǔ le gāi xué​shù lǐng​yù de kòng​bái.

   This research filled a gap in this academic field.

   Source: Dong Chinese Dictionary

2. 这项科研成果填补了国内在该领域的空白。

   zhè xiàng kē​yán chéng​guǒ tián​bǔ le guó​nèi zài gāi lǐng​yù de kòng​bái.

   This scientific achievement has filled a gap in this field in China.

   Source: Dong Chinese Dictionary