n. any device that receives a signal or stimulus (as heat or pressure or light or motion etc.) and responds to it in a distinctive manner
n. rectifier that extracts modulation from a radio carrier wave
n. electronic equipment that detects the presence of radio signals or radioactivity
n. 发现者, 检验器, 检波器
[计] 检波器; 检测器
1. The smoke detector went off when I burned the toast.
烤面包时，烟雾探测器响了。
2. Scientists use a detector to find hidden minerals in the ground.
科学家使用探测器来寻找地下的隐蔽矿物。
3. The metal detector helped us find coins on the beach.
金属探测器帮助我们在海滩上找到硬币。