1. 专门化：special transfer 特殊迁移 | specialism 专门化 | specialist 专家

2. 专攻：specialise 专门研究 | specialism 专攻 | specialist 专门医师

3. 专业,专长：spasm 痉挛,抽搐;阵发 | specialism 专业,专长 | spiritualism 招魂说(术)

4. 专门/专攻：specialised /专门的/ | specialism /专门/专攻/ | specialist /专门医师/专家/专门/

1. 专业(研究);专长;特长
Someone's specialism is a particular subject or skill which they study and know a lot about.

e.g. ...a teacher with a specialism in mathematics.
一位数学专业的老师

2. 专业化;专门化;专科化
Specialism is the act of specializing in a particular subject.

e.g. The needs of children may not be best met by an overemphasis on subject specialism.
过分强调学科的专业化也许并不能最好地满足儿童的需要。

noun

1. the special line of work you have adopted as your career

e.g. his specialization is gastroenterology

Synonym: specializationspecialisationspecialtyspeciality

2. the concentration of your efforts on a particular field of study or occupation