still alarm

例句：

1. 1. The sudden drop in the stock price caused an alarm to go off.
   股票价格的突然下跌引发了警报。
2. 2. The old clock on the wall was an alarm for us to get ready for bed.
   墙上的老钟是我们准备睡觉的警钟。
3. 3. The loud noise of the fire alarm woke us up from our sleep.
   火警的巨响把我们从睡梦中惊醒。