英和和英

He is engrossed in his profession.

He is engrossed in his profession.

to choose a profession

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

{that} field of speciality

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

a confrère

the act of specializing

He is engrossed in his profession.

being beyond the bounds of a particular field of study

become professional

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

a field of specialty

become overly specialized

He is engrossed in his profession.

turn professional [pro]

a special course of education

to devote oneself to anything

a crowded profession

specialized skills

a specialized sphere of knowledge

to specialize a subject

to engage in a specialized study of a specific topic

He is engrossed in his profession.

a person who specializes in something

be outside [out of] one's field

to set a value on one's profession

the professional man or woman possesses distinctive qualifications

serve in a specific professional capacity

He is engrossed in his profession.