| 词条 | Particle density (particle count) |
| 释义 | Particle density, in the context of particle counts, is a measurement of the number of particles in a spatial unit of a particle-bearing medium. Where the spatial unit is one of volume, the medium is likely to a fluid; in another class of cases, the unit is one of area of a surface, and the particles rest on or adhere to that surface. {{Physics stub}} 2 : Density|Particulates |
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