yòng​fēi​suǒ​xué

to be in a field unrelated to one's studies

Senses

用非所学/ 用非所學 yòng​fēi​suǒ​xué to be in a field unrelated to one's studies

To be engaged in an occupation not related to one's training; to fail to apply what one has learned in one's work.

References

synonym 用非所学/用非所學 学非所用/學非所用