动词
中文翻译：信号
同义词：
['notify', 'indicate', 'proclaim', 'declare', 'advertise', 'signalize']
例句：
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1. The trafficpoliceman is signaling for the driver to stop.
交通警察正在示意司机停车。
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2.The company has signaled that it will invest in new technology.
该公司已宣布将投资新技术。
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3.The pilot signaled for assistance when he saw the plane in trouble.
飞行员在飞机遇到麻烦时发出了求救信号。