photoelectric cell
/fˌəʊtəʊɪlˈɛktɹɪk ˈsɛl/
n
English · photoelectric cell中文 · 光电元件Español · celda fotoeléctricaFrançais · cellule photoélectrique
意味：Detector that measures the intensity of ambient light and controls the amount of light emitted by the flash.