major [ˈmeɪdʒə(r)] ① adj. 首要的，关键的；规模较大的 ② n. 专业课程，专业方向；大型企业

例句：Dissimilar to the shares of oil majors such as Exxon Mobil and Chevron, coal stocks are not the ones that investors are compelled to hold.【2015 - 6《经济学人》】 和埃克森美孚、雪佛龙这类石油大型企业的股票不一样，煤炭股票并非投资者必须持有的股票。