major in

专攻，专修

mainland, mainline, mainly, mainmast, mainsail, mainspring, mainstay, mainstream, maintain, maintain contact with, maintenance, maintenance order, maisonette (also maisonnette), maitre d'hotel, maize, Maj, majestic, majestically, majesty, major, major premise, major-general, majority, majority verdict, make, make request for, make a contribution to, make a dash for, make a deal with, make a deposit, make a difference, make a display of, make a face, make a fool of, make a fuss of, make a go of, make a good job of sth., make a guess at, make a journey, make a mess of,