名词
中文翻译：信号
同义词：
['sign', 'indicator', 'indication']
例句：
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1. The policeman used his flashlight to signal the driver to stop.
警察用他的手电筒示意司机停车。
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2.The weather forecast indicated that it would besunny tomorrow.
天气预报显示明天会是晴天。
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3.The new policy is a clear signal ofthe government's intentions.
新政策是政府意图的明确信号。