set off

出发；动身；使爆炸英释中释When you set off, you start a journey

1 Nichols set off for his remote farmhouse in Connecticut..尼科尔斯启程前往他位于康涅狄格州的偏远农舍。

2 The president's envoy set off on another diplomatic trip..总统特使再次踏上外交之旅。

3 Any escape, once it's detected, sets off the alarm..逃跑一旦被侦察到，就会触发警报。