(noun.) a device that signals the occurrence of some undesirable event.
(noun.) an automatic signal (usually a sound) warning of danger.
(noun.) fear resulting from the awareness of danger.
(verb.) warn or arouse to a sense of danger or call to a state of preparedness; 'The empty house alarmed him'; 'We alerted the new neighbors to the high rate of burglaries'.
凯茜录入
手打:洛雷塔