| 单词 | etalon |
| 释义 | Word Frequency etalon(ˈɛtəˌlɒn) noun physics a device used in spectroscopy to measure wavelengths by interference effects produced by multiple reflections between parallel half-silvered glass or quartz plates Word origin C20: French étalon a fixed standard of weights and measures, from Old French estalon; see also stallion |
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