英和和英

He is engrossed in his profession.

the act of specializing

{that} field of speciality

He is engrossed in his profession.

a field of specialty

a special course of education

a confrère

become overly specialized

He is engrossed in his profession―devoted to his profession.

to choose a profession

to make a special study of―made a specialty of―make a study of―a subject

He is engrossed in his profession.

being beyond the bounds of a particular field of study

He is devoted to his profession―enthusiastic in his profession.

a specialized sphere of knowledge

a crowded profession

He is engrossed in his profession.

specialized skills

He is engrossed in his profession.

to engage in a specialized study of a specific topic

to specialize a subject

to devote oneself to anything

be outside [out of] one's field

a person who specializes in something

something that is outside a person's field of expertise

serve in a specific professional capacity

of or relating to a profession

to technicalize

highly professional

to set a value on one's profession