闪光信号(机)

blink signal的用法和样例：

例句

The flagship flashed a signal to the fleet.旗舰向舰队发出闪光信号。
Leon was supposed to signal us at the proper time by flashing a light in the window, but apparently he fell asleep at the switch.利昂本来应该在适当的时候从窗口给我们发出闪光信号，但他显然没有履行职责。

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