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signal, (gesture, sound) 信号
马铃薯菇凉
信号 [xìn hào] semaphoresignalsigncall letter
ling爱吃
信号 [词典] signal; semaphore; gun; [电影] The Signal; [例句]火车切不可越过危险信号。A train must not pass a signal that is at danger.
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