specialize in

• Students specialize in a particular type of practical joke: the hoax .
  学生们擅长于一种特殊形式的恶作剧--设置骗局。
• Most of the employment agencies specialize in some particular kind of work .
  职业介绍所大多专门介绍某一种特殊工作。
• I have decided to specialize in plant chemicals that can be used for insecticides .
  我已经下决心专门研究可以用作杀虫剂的植物中的化学物质。
• Theorists specializing in stellar interiors were turning to more challenging problems .
  专攻恒星内部的理论家们都想改行去搞更能引起争议的问题。
• There was a swirling mist, damp and bitterly cold, the kind the island specialized in .
  空中漂着旋涡般的雾，湿气沾衣，寒气逼人，这是岛上特有的气候。
• The large hotel chains employ architects and interior decorators who specialize in hotel work .
  大型旅馆连锁聘有对旅馆业务有专门知识的建筑师和内部装璜师。
• The company began by specializing in radios but has now decided to branch out into computers .
  该公司开始时专营无线电器材，现在已决定扩展业务经营计算机了。
• It must engage in barter in order to trade those goods that the household specializes in producing .
  它就一定是进行易货贸易，以便把家庭专门生产的产品拿去交换。
• I had not planned to specialize in chemicals from plants when i began my scientific career .
  当初开始从事科学研究工作的时候，我并没有打算专门研究植物中的化学物质。