false alarm意思是虛驚一場，你也可以直接解釋爲假警報、烏龍。
E.g. Someone called to say a plane crashed into 101 building, but it turned out to be a false alarm.
提到alarm這個字，就要聯想到go off這個片語（鬧鐘鈴響）。
E.g. My alarm went off at 7:30. 我的鬧鐘今天七點半響了。
如果要講設定鬧鐘，就用set這個字，設定在幾點鈴響，記得介系詞是for不是at，不要被中文的介詞「在」給誤導了。
E.g. I set the alarm for 6:45 AM. (= My alarm will ring at 6:45 AM.)
如果用at，就表示你是在那個時間設定好鬧鐘，而不是指你預定的時間響起。
如果用to，表示你把時鐘調成那個時間。
E.g. I set the alarm to 6:45 AM. (= I set the time that my clock shows to 6:45AM.)
關掉鬧鐘：turn off/ switch off
Note that the clock must be set to the correct time, and the alarm must be set for the time you want to wake up.
中文會說驚擾、震驚、驚恐，也可以搭配alarm這個字。
provoke/create/cause alarm解釋爲引發震驚、造成騷動。
E.g. The outbreak of bird flu（禽流感） provoked alarm among all citizens.
express/register alarm 解釋為流露出驚恐。
E.g. The president expressed alarm at the news.
E.g. Julia’s face registered no alarm at all after finding out her husband is cheating on her.
引發、觸發（警鈴）：trigger/activate/set off
E.g. The alarm can be easily triggered.
你有沒有發生過一些false alarm的故事呢？
請在下面留言！
