major in

She majored in Maths and Physics at university.

她在大学里修数学和物理。

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

斯通先生在哥伦比亚大学他四年的大学生活, 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类产品： 铆螺，尼龙锁紧螺，螺，法兰螺，以及各类汽车标准件。