derail

1. V-T To derail something such as a plan or a series of negotiations means to prevent it from continuing as planned. 打亂 (原定計劃)[journalism]

The present wave of political killings is the work of people trying to derail peace talks. 現在的政治謀殺浪潮是那些試圖破壞和平談判進程的人所爲。

2. V-T/V-I If a train is derailed or if it derails, it comes off the track on which it is running. 脫軌

At least six people were killed and about twenty injured when a train was derailed in an isolated mountain region. 火車在一片偏僻的山區脫軌，導致至少六人死亡，約二十人受傷。