旁及

páng jí wén xué

旁及文学

also take an interest in literature

tā zhuān gōng gǔ diǎn wén xué páng jí lì shǐ

他专攻古典文学，旁及历史。

He studies classical literature , but also takes an interest in history.

tā zhuān gōng lì shǐ páng jí kǎo gǔ

他专攻历史，旁及考古。

He is an historian, but also has a side interest in archaeology.