be buried in是被动语态。主动语态是bury oneself in something/doing.中文意思是“埋头于做某事”。

例如，这个年轻人整天埋头于繁重工作中，最后累倒住院了。

The young man was buried in/buried himself in heavy work all day long and finally collapsed into hospital.

他埋头苦练书法几十年，最后成为了书法大师。

He was buried in practicing calligraphy for decades, and finally became a master of calligraphy.