n.[C]

1. 微粒；颗粒[（+of）]
   Particles of dirt settled on the tablecloth.

   尘埃落在台布上。

2. 极小量[（+of）]
   There is not a particle of truth in his report.

   他的报告没有一点真实性。

3. （物）粒子，质点
   He is studying the properties of these particles.

   他在研究这些粒子的性质。

4. 【语】虚词（包括某些副词，冠词，介词，连词等）；字首，字尾

n.

1. a minute portion of matter.
2. Physics  a subatomic constituent of the physical world, e.g. an electron, proton, neutrino, or photon.
3. Grammar  a minor function word that has comparatively little meaning and does not inflect, e.g. in, up, off, or over used with verbs to make phrasal verbs.