signal
US /ˈsɪɡ.nəl/
UK /ˈsɪɡ.nəl/
1.
信號, 標誌
a gesture, action, or sound that conveys information or an instruction
:
•
He gave a signal to the driver to stop.
他向司機發出停車信號。
•
The traffic light changed to a green signal.
交通燈變成了綠色信號。
2.
信號, 電波
an electrical impulse or radio wave transmitted or received
:
•
The phone has a weak signal here.
這裡的手機信號很弱。
•
The radio signal was clear.
無線電信號很清晰。