Mean Time Between Alarm之间的平均时间敲响了警钟 Mississauga Technology Business Accelerator (Canada)1998技术业务加速器(加拿大) Mountain Top Business Alliance (Mountain Top, PA)山顶商务联盟(山顶、PA) Mean Time Between Assists代表时间之间的助攻 Mission Trail Bowhunters Association (Prunedale, CA)Prunedale使命小道们协会,CA Malta Tenpin Bowling Association马耳他Tenpin保龄球协会 Metro Tulsa Baseball Association (Oklahoma)俄克拉何马州的塔尔棒球协会(地铁) Migratory Bird Treaty Act of 19181918年的候鸟条约 Montreal Tenpin Bowling Association蒙特利尔Tenpin保龄球协会 Montana Bow and Arrow (hunting license)蒙大拿的弓和箭(狩猎证) Modified Tight Binding Approximation修改紧束缚近似 Monroe Township Baseball Association (Mechanicsburg, PA)梦露乡棒球协会(Mechanicsburg、PA) Melbourne Tenpin Bowling Association (Melbourne, Australia)墨尔本Tenpin保龄球协会(墨尔本,澳大利亚) Mountain Bike Association of Australia澳大利亚的山地自行车协会 Massachusetts Thoroughbred Breeders Association (Burlington, MA)麻萨诸塞州良种繁育协会(底特律,麻萨诸塞州)