flashing signal

• 闪光信号

flashing signal的用法和样例：

例句

1. The lighthouse flashes signal twice a minute.
   灯塔一分钟发两次闪光信号。
2. 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。