| 释义 |
photoelectric cellBrE /ˌfəʊtəʊɪˌlektrɪk ˈsel/ NAmE /ˌfoʊtoʊɪˌlektrɪk ˈsel/ (also photo·cell ) noun an electric device that uses a stream of light . When the stream is broken it shows that sb /sth is present , and can be used to control alarms , machinery , etc .光电池；光电感应器；光电管 |