专门从事
Most students do not expect to specialize in economics.
大多数学生并不想把经济学作为专业.
I'd decided to specialize in kids, because I've always liked them.
我决定专攻小孩, 因为我总是喜欢他们.
He decided to specialize in entomology after graduation.
他决定毕业后专攻昆虫学.
Did you always know you wanted to specialize in orthopedics?
你一直都知道你要做个矫形外科医生 吗 ?
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.
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