发出信号

• discrete sampling
• signal
• give the high sign

参考释义

发出信号

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例句

1. 第二天清晨，她听到头上有飞机飞过，却不知道怎样才能发出信号，
   Early next morning, she heard planes passing overhead and wondered how she could send a signal.
2. （橄榄球赛中的）四分卫厉声发出信号
   The quarterback barked out the signals.
3. 接球员，捕手接球的人，尤指位于本垒之后发出信号并接球的棒球选手
   One that catches, especially the baseball player positioned behind home plate who signals for and receives pitches.
4. 闪光信号，照明弹一种能产生强光用来发出信号、照明或鉴定物体的装置
   A device that produces a bright light for signaling, illumination, or identification.