名词中文翻译1
中文翻译：Unknown
同义词：
['alert', 'cautionary', 'signal例句：1. The police officer gave a warning sign to the driver.（警察给司机一个警告标志。）']
例句：
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1. The police officer gave a warning sign to the driver.
警察给司机一个警告标志。
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2. The road signs are warning signs for drivers.
道路标志是给驾驶员的警告信号。
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3. The traffic police posted a warning sign in front of the intersection.
交通警察在交叉口前放置了一个警告标志。