动词
中文翻译：信号
同义词：
['notify', 'signal', 'notify', 'announce', 'indicate例句：1. The traffic policeman was signaling for the driver to slow down.（交通警察正在示意司机减速。）']
例句：
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1. The traffic policeman was signaling for the driver to slow down.
交通警察正在示意司机减速。
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2. The radio station is signaling its listeners to tune in on channel 9.
电台正通过频道9向听众发出信号。
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3. The pilot signaled the plane to land at the airport.
飞行员向飞机发出信号，让它在机场降落。