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| 单词 | photometrograph |
| 释义 | † photometrographn. Obsolete. rare. An instrument for recording the intensity of light at different depths in water. ΚΠ 1898 Geogr. Jrnl. 12 453 I have here a graphic representation of the results of experiments I made..with a photometrograph..,which shows how rapidly light loses its intensity in penetrating below the surface [of the sea]. This entry has been updated (OED Third Edition, March 2006; most recently modified version published online June 2018). < |
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