名词
中文翻译：警报词
同义词：
['warning', 'alert', 'signal']
例句：
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1. The alarm-word on the doorbell is a loud beeping sound.
门铃上的警报词是一个响亮的嘟嘟声。
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2. She read the warning-words on the sign before crossing the street.
她在过马路前读了警示词。
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3. The policeman used his hand as an alarm-word to warn everyone to stay away from the crime scene.
警察用手势作为警报词来警告大家远离犯罪现场。