名词
中文翻译：预警
同义词：
['early alarm', 'pre-warning']
例句：
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1. The early alarm system was designed to prevent accidents before they happened.
早期的预警系统旨在在事故发生之前预防事故。
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2. He received a pre-warning of the imminent storm and took necessary precautions.
他提前收到了暴风雨即将来临的警告，并采取了必要的预防措施。
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3. The pre-alarm signal is a warning that something bad is about to happen.
预先警报信号是一种即将发生坏事的警告。