planed signal

• 平面信号,二维信息

planed signal的用法和样例：

例句

1. The search plane signaled that help was on the way. The men in the lifeboat just had to sweat it out.
   搜寻遇难人员的飞机发出救援人员已启程的信号，救生艇上的人员只有焦急地等待。