I worked in the field of education, doing a lot of work in field of education.

我在教育领域工作过，在教育领域内做过很多工作。

哈佛公开课 - 幸福课课程节选

I worked in the field of education, doing a lot of work in field of education.

我在教育领域工作过，在教育领域内做过很多工作。

哈佛公开课 - 幸福课课程节选