n.出軌
The trains are all to today because of a derailment farther down the line. 今天的火車混亂不堪，因為前面有一列火車出軌了。
Police investigating the train derailment have not ruled out sabotage. 警方調(diào)查火車出軌事件，沒有排除人為破壞的可能。
