n. an expert who is devoted to one occupation or branch of learning
n. practices one branch of medicine
n. 专门医师, 专家
a. 专业的, 专家的
1. The doctor is a heart specialist who helps people with heart problems.
这位医生是一位心脏专家，专门帮助有心脏问题的人。
2. She consulted a marketing specialist to improve her business.
她咨询了一位营销专家，以改善她的生意。
3. The school hired a language specialist to support students learning English.
学校聘请了一位语言专家来支持学习英语的学生。