名词
中文翻译：旋转信号
同义词：
['rotating signal', 'rotating code', 'rotating message']
例句：
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1. The rotary signal is a way to send messages without using wires.
旋转信号是一种不使用电线发送信息的方式。
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2. In the old days, rotary signals were used for communication over long distances.
在旧时代，旋转信号被用来进行远距离通信。
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3. The rotary signal was designed to be easily understood by people of all ages.
旋转信号设计得易于各年龄段的人理解。