1 sentence

1. 他在读研期间主攻软件工程，尤其擅长开发手机应用。

   tā zài dú​yán qī​jiān zhǔ​gōng ruǎn​jiàn gōng​chéng, yóu​qí shàn​cháng kāi​fā shǒu​jī yìng​yòng.

   During his graduate studies, he specialized in software engineering and was particularly good at developing mobile applications.

   Source: Dong Chinese Dictionary