specialize, specialise

v [I, Ipr] ~ (in sth) (a) be or become a specialist 成为专家; 专门从事; 专攻: He specializes in oriental history. 他专门研究东方史. (b) give particular attention to (a subject, product, etc); be well-known for 专注於（某项目、 产品等）; 以...闻名: This shop specializes in chocolates. 这个商店专门出售巧克力.

spear, spear gun, spearhead, spearmint, spec, special, special agent, Special Branch, special constable, special delivery, special licence, special pleading, special school, special student, specialise, specialist, speciality, specialization, specialization, specialisation, specialize, specialized, specialized, specialised, specially, specially-made, specialty, specie, species, specific, specific gravity, specifically, specification, specificity, specify, specimen, specious, speciously, speciousness, speck, speckle, speckled,