main line

principal railway line between two places （铁路的）干线, 主线: the main line from London to Coventry 从伦敦到考文垂的铁路干线 * [attrib 作定语] a ,main-line `train, `station 铁路干线列车、 车站.

maidenhair, maidenhead, maidenhood, maidenly, maidservant, mail, mail order, mail-bag, mail-order, mailbox, mailed, mailer, mailing list, mailman, mailshot, maim, main, main clause, main deck, main drag, mainbrace, mainframe, 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,