从事干用英语怎么说

在英语中，表示“从事干用”的常用表达有：
Engage in a trade or profession: 从事一项职业或职行
例句：
He has been engaged in the construction industry for over 30 years. 他从事建筑行业已超过30年。
She decided to engage in teaching as a career. 她决定从事教师职业。
Pursue a career: 追求一个职业
例句：
He has always wanted to pursue a career in business. 他一直想从事商业职业。
She decided to pursue a career in journalism after completing her studies. 她在完成学业后决定从事新闻职业。
Work in a certain field or occupation: 在某一领域或职业工作
例句：
He works in the finance industry. 他在金融行业工作。
She works as a nurse at the local hospital. 她在当地医院担任护士。
这些表达均可用来描述一个人在某一领域或职业工作的情况，帮助人们了解对方的职业背景。