| 单词 | photoelectric cell |
| 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 |
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