display signal

例句：

1. 1.The display signal is very clear and easy to understand.
   显示信号非常清晰且易于理解。
2. 2. The display signal was used to indicate the presence of a hazard.
   显示信号被用来指示危险的存在。
3. 3. The display signal helped to guide the pilot through the fog.
   显示信号帮助飞行员穿越雾区。