(informal)begin behaving in a strange, abnormal, or wildly uncontrolled way
(非正式)行为不轨，越轨；出毛病；神经错乱
(informal)behaving or functioning in a normal or regulated way
(非正式)在轨道上；顺利，顺遂，正常
he is determined to get the club &B{back on the rails}.
他决心使俱乐部回到正常轨道上来。
(of a racehorse or jockey) in a position on the racetrack nearest the inside fence
（赛马，骑师）近内栏，靠内栏