false-alarm
柯林斯詞典
1. N-COUNT When you think something dangerous is about to happen, but then discover that you were mistaken, you can say that it was a false alarm. 虛驚
...a bomb threat that turned out to be a false alarm. …最終證實(shí)是虛驚一場(chǎng)的炸彈恐嚇。
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