Photocell: or photoelectric cell, or electric eye; Solid-state device with a photosensitive cathode that emits electrons when illuminated and an anode for collecting the emitted electrons.
光电管：一种固体探测器，有一个对光灵敏的阴极，受到光照时能发射电子，还有一个用于收集所发射电子的阳极。
The doors swung open after a photocell— an" electric eye"— spied my approach.
一颗光电池（电子」）测到我的靠近后敞开大门。
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