招引注意的信号（Signals to Attract Attention），指的是船舶为避碰目的而招引他船注意所发出的灯光或声响信号。
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Where things have become difficult is over whether or not researchers should be allowed to send signals into space pre-emptively, in order to attract the attention of any alien listeners who might be out there.
ECONOMIST: An argument over whether to send messages to aliens
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