photocell
n. [电]光电池；[电子]光电管（等于 photoelectric cell）
例句
The door is photocell controlled by operating a keyboard.
那扇门是通过操纵一个键盘，用光电管来控制的。
It intercepts a portion of the light impinging on the photocell.
它遮住一部分照射在光电管上的光。
Photocell-activated lighting does not need to be programmed seasonally but light sensors can fail.
光电激活照明不需要进行编程，季节性，但光传感器可能会失败。
