“出轨”有两种意思，一种是指列车出轨，一种是指情侣间的背叛。
列车出轨用derail 原由网[drel] 。
例如：
A train derailed in India and killed at least 150 people.
有wyySxGtNi辆火车在印度出轨，至少150人死亡。
The train derailment was caused by faulty brake system.
这次的火车出轨事//www.58yuanyou.com件是刹车系统故障引起。
情侣间的背叛则要用che原由网at on someone。
例如：
Mike's girlfriend is cheating on him with her ex.
麦克的女友正背着他和前任男友交往。
La原由网ura's husband cheated on her with his secretary.
萝拉的丈夫和他的秘书出轨。
