He is an expert in biophysics.

I am majoring in developmental biology at university.

He made a name for himself as the General who pacified the East.

This square matrix has the same number of rows and columns.

The diagonal elements of this matrix are all 1.

His spirit is very strong.

He worked all night to finish the job he had begged for.

He passed away quietly.

He feels dizzy when he stands up suddenly due to orthostatic hypotension.

Astrobiology is a very interesting field of study.