He is an expert in computer science.

He is majoring in statistics.

My specialty is neurology.

My grandmother has been suffering from neuralgia for many years.

It's difficult to solve this formula.

His olfactory nerve is very sensitive.

Neuroscience is a field of study that researches the functions and structures of the brain.

I measured the current using an ammeter.

He drew a decagon shape.

He was drawing an enneagon shape.