| 单词 | crossed-h |
| 释义 | crossed-h in British English (ˌkrɒstˈaɪtʃ) noun a constant used in quantum mechanics, equal to the Planck constant divided by 2π. It has a value of 1.054571596±0.000000078 × 10 −34 joule seconds Also called: Dirac constant |
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