specialty; specialized field; main field of study (at university); major; CL:門|门[men2],個|个[ge4]; professional

specialized; dedicated (to a particular field or purpose); specially; specifically (for a particular purpose); (of institutions, personnel etc) designated or assigned for a specific task; special

to focus one's attention; to concentrate on (doing sth)

to focus; to concentrate; to give one's full attention

album; record (music); special collection of printed or broadcast material