a device that detects some physical quantity and responds usually with a transmitted signalthe cat accidentally triggered the motion sensor, which set off the alarm
the cat accidentally triggered the motion sensor, which set off the alarm
detector
eyeelectric eye, photoelectric cellalarm(also alarum), trigger
ca. 1928
英语同义词词典收录了63618条英语词条，基本涵盖了全部常用同义词或反义词的辨析及翻译，是英语学习的有利工具。