Particle Physics. [See note s.v. S, n.1 15] d is the symbol of the down quark (see down, adj. 8).
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| 释义 | the world > matter > physics > atomic physics > particle physics > quark > [noun] > differentiating property > down (1) D1964 Particle Physics. [See note s.v. S, n.1 15] d is the symbol of the down quark (see down, adj. 8). |
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