He is a giant in his field.

他是他领域的巨人。

She is an expert in her field.

她是该领域的专家。

Teachers may also lead their local museums or historical societies for help in getting students more interested in this important field.

老师们也可以带领当地博物馆或历史学会来帮助学生对这个重要领域更感兴趣。

Politics is a complex field.

政治是一个复杂的领域。

She works in the technology field.

她在科技领域工作。