- a bell rung to alert people to danger
noun: warning bell, plural noun: warning bells
- 1. a bell rung to alert people to danger:
the warning bells were ringing
the delay set off warning bells in my head
...流口水(UR，非制約反應)。 To condition a dog to salivate, choose a sensory warning signal (bell or light) to serve as a CS. Present that warning signal repeatedly...
...dormir.The first period starts at eight-forty,the first bell goes 5 minutes before that to warn us. La première période commence à huit...
...machine. In some computer terminals, the ASCII character code 7, bell character, outputs an audible beep. Beeps are also used as a warning when a truck or bus is reversing — a sound sometimes referred...