sensor
n
device (eg a photoelectric cell) that detects light, heat, humidity, etc 探测光、 热、 湿度等的装置(如光电池)
Smoke sensors warned us of the fire. 烟雾探测器已向我们发出火警警报.
I was in the kitchen cooking something and I felt the floor move.
我正在厨房煮东西,感到地板在震动。
You were very kind. You brought out all your jewellery and you told me I could take anything I wanted. There were so many beautiful things that it was hard to choose. And then I saw a lovely diamond necklace with a big blue stone in the centre.