photocell
US /ˈfoʊ.t̬oʊ.sel/
UK /ˈfəʊ.təʊ.sel/
名词
光电池, 光电管, 光敏电阻
a device that generates an electric current or voltage when exposed to light, or whose resistance changes when light falls on it
示例:
•
The streetlights are controlled by a photocell that turns them on at dusk.
路灯由一个在黄昏时自动开启的光电池控制。
•
The automatic door uses a photocell to detect when someone is approaching.
自动门使用光电管来探测是否有人靠近。