specialize
verb(British English also specialise)
[intransitive]to become an expert in a particular area of work, study or business; to spend more time on one area of work, etc. than on others 专门研究(或从事);专攻 Many students prefer not to specialize too soon. 很多学生不愿过早地确定专业。 - specialize in something
He specialized in criminal law. 他专攻刑法。 The shop specializes in hand-made chocolates. 这家商店专营手工制作的巧克力。
Word Originearly 17th cent.: from French spécialiser, from spécial ‘special’.