I felt a growing sense of alarm when he did not return that night.

那天夜里他没有回家，我越来越感到恐慌。

《牛津词典》

Now shake yourself off, restore the pre-waking conditions, return to bed, reset your alarm, and repeat.

接着再调整一下自己，回到先前的那种状态，重新躺到床上去，重新设定好你的闹钟，并重复这样的训练。

youdao

Risk of heart attack is increased for firefighters when they respond to an alarm, return from an incident, or engage in physical activity, including training.

当他们在听到警报赶去救火时，当他们从事故现场回来时，当他们进行包括训练在内的体力活动时，心脏病发作的风险就会增加。

youdao

But the alarm was raised by two friends when he failed to return to a flat they were renting in Venosc.

BBC: Simon Daw

Sierra's family and friends first sounded the alarm last week after she did not arrive on a return flight from Istanbul on January 22.

CNN: Body of missing NY mother found in Turkey