名词
中文翻译：信号
同义词：
['sign', 'indication', 'indicator例句：1. The policeman signaled the driver to stop.（警察向司机示意停车。）']
例句：
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1. The policeman signaled the driver to stop.
警察向司机示意停车。
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2.The new product has a clear signal of success.
新产品有明显的成功迹象。
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3. The weather forecast indicated a change in the weather pattern.
天气预报预示天气模式将发生变化。