alarmed  
adjective uk/əˈlɑːmd/ us/əˈlɑːrmd/
  (PERSON)      
  [ after verb ]受某事物惊吓(或困扰) 
worried or frightened by something
  I was a bit alarmed at/by how much weight she'd lost. 看到她瘦了那么多,我有点儿担心了。 
 [ + to infinitive ] I was alarmed to hear that she was coming. 听到她要来,我慌了神。 
 [ + that ] I'm rather alarmed that we haven't heard anything. 我们什么消息也没有听到,我非常担忧。 
   (VEHICLE)      
 装有警报系统的
An alarmed vehicle or place has an alarm in it that, when active, will make a loud noise if anyone enters or touches it.
  Warning: this building is alarmed. 警告:本楼装有警报系统。