signal fire 信号火
visual signaling 视觉信号
signaling theory 信号理论
wireless signaling 无线信号传递
A: Did you see his signaling?
A：你看到他在发信号了吗？
B: Yes, he was waving his hands to get our attention.
B：是的，他正在挥手以引起我们的注意。
1) 发信号的行为
2) 信号传递
3) 传达信息
1. 发信号；传达信息
noun
1. The act of sending signals or conveying information.
Synonym: communicating, gesturing