Originally Military. spec. A signal given by means of a siren, hooter, etc., to warn the public that an attack is imminent; esp. an air raid…
| 单词 | θ85229 |
| 释义 | the world > action or operation > undertaking > preparation > [noun] > state of being prepared or ready > for an air raid (1) alert1940 Originally Military. spec. A signal given by means of a siren, hooter, etc., to warn the public that an attack is imminent; esp. an air raid… |
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