动词
中文翻译：信号
同义词：
['notify', 'indicate', 'proclaim', 'declare', 'advertise']
例句：
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1. The policeman signaled for the driver to stop.
警察示意司机停车。
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2. The traffic light is signaling that it's time to turn left.
交通灯正在示意左转。
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3. The pilot signaled the plane to land at the airport.
飞行员向飞机发出降落机场的信号。