动词specialize的现在分词形式
A bakery specializing in French pastry. 专制法国点心的面包店
A physician specializing in the diagnosis and treatment of allergies. 过敏症专家过敏症诊断和治疗的专科医生
A dental technician specializing in making and fitting dentures as a direct service to the public rather than through a licensed dentist. 假牙师一种牙科技术师，其专长在于制造和安装假牙，他可以直接为公众服务，而不必通过有执照的牙科医生
