My grandfather used to be a steam locomotive driver.

She has difficulty listening to music due to a problem with her auditory organ.

I am majoring in machine learning.

My major is mechanical engineering.

My major is mechanical engineering.

The semicircular canals are an important part for maintaining balance.

He drew a circle using geometric construction.

He is immersed in the study of geometrical optics.

He is interested in geometrical shapes.

My father is engaged in the livestock industry.