1.But if you go to law school and complete your studies, your career is back on track.
back on track 重回正轨;重上轨道;改过自新
David put me back on track.
戴维让我重新回到了正轨 。
It may take some time to get the British economy back on track.
要使英国经济重新回到正轨可能需要一段时间 。
2.When something goes off the rails, it is always a bad thing.
go off the rails (非正式)行为不轨; 越轨; 出毛病; 神经错乱
He is always a dutiful person, so will not go off the rails.
他向来是个守本分的人,不会做出越轨之事 。
Some people were injured when the train went off the rails.
火车出轨时一些人受了伤 。