\"set off\" 有多种含义和用法，以下是其中一些：
1. 出发；启程：To start a journey or trip.（例如：They set off early in the morning.） 2. 开始；启动：To begin something, especially an explosion or fire.（例如：The fireworks set off at eight o\'clock.） 3. 引起；激发：To cause someone to think or feel something strongly.（例如：Her words set off a wave of anger in him.） 4. 装饰；装点：To decorate or adorn something.（例如：She set off her living room with candles and flowers.） 5. 使分离；隔开：To separate people or things by moving them apart.（例如：The police set off the crowd.）