traffic signals 交通信号
signal strength 信号强度
wireless signals 无线信号
signal loss 信号丢失
A: Have you noticed any signals of improvement?
A：你注意到任何好转的迹象了吗？
B: Yes, the patient's condition is stable.
B：是的，患者的情况很稳定。
1) 信号，迹象
2) 示意，发信号
3) 通信信号
1. 信号，迹象
2. 示意，发信号
noun
1. A gesture, sound, or object used to convey information.
2. An indication or sign that something is happening.
Synonym: sign, indication