从事

be solely/wholly occupied with sth

go in for/take up/follow/pursue/undertake a profession

take up writing as a profession; be engaged in literary work

engage oneself in/go in for athletics/sports

follow the plough

be engaged in trade/politics

go in for/work on technical innovations

take up open-air sports

follow a legal career; embrace the profession of law; follow the law; practise as a lawyer

be engaged in philanthropic activities

go into publishing/banking

handle cautiously; act with caution

deal with according to military law

handle rashly; act rashly