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| 单词 | photochronograph |
| 释义 | photochronograph in British English (ˌfəʊtəʊˈkrɒnəˌɡrɑːf, -ˌɡræf) noun physics an instrument for measuring very small time intervals by the trace made by a beam of light on a moving photographic film Derived forms photochronography (ˌfəʊtəʊkrəˈnɒɡrəfɪ) noun photochronograph in American English (ˌfoʊtoʊˈkrɑnəˌgræf) noun 1. a. a device formerly used for recording motion in a series of photographs taken at regular, extremely brief, intervals b. a photograph so taken 2. an instrument for recording the exact time of an event by exposing a moving photographic plate to the tracing of a thin beam of light synchronized with the event Word origin photo- + chronograph |
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