major in

She majored in Maths and Physics at university.

她在大学里修数学和物。

Mr. Stone spent his undergraduate days in Columbia University, majoring in economics.

先生在哥伦比亚大学度过了他四年的大学生活, 修经济学。

Now our company is majoring in nuts series: rivet nuts, blind rivet, insert nuts,nylon locknuts, welded nuts, flange nuts and other kinds of auto standard parts.

上海锐拓五金现在营紧固件系列中的螺母产品： 铆螺母，尼龙锁紧螺母，焊接螺母，法兰螺母，以及各标准件。