alerting

名词 alerting:

1. a state of readiness to respond
   同义词：alertness
2. a warning serves to make you more alert to danger
   同义词：alert

动词 alert:

1. warn or arouse to a sense of danger or call to a state of preparedness
   同义词：alarm, alert

1. An alert listener will have noticed the error.
   耳朵尖的人能听出这个错。
2. In telephony, the use of tones to transmit supervisory, address and alerting signals over a circuit.
   在电话技术中，利用音调在电路中传送监控、地址和报警信号的做法。