动词
中文翻译：Unknown
同义词：
['signal', 'indicate', 'notify', 'announce', 'signalize']
例句：
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1. The pilot signaling the plane to land.
飞行员向飞机发出降落的信号。
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2.She was signaling for help from a passing car.
她从一辆路过的汽车那里发出求救信号。
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3. The policeman was signaling his men to stand down.
警察正在向他的手下发出停止的信号。