A particle, such as an electron, a proton, or a neutron, having half-integral spin and obeying statistical rules requiring that not more than one in a set of identical particles may occupy a particular quantum state.
费密子一种如电子、质子或中子等自旋为半整数的基本粒子，具有一种使得不可能有多于一个的粒子占有任何一个特殊的量子力学态的量子力学对称性
There wasn't a particle of truth in what he said.
他说的没有一点真话。
We can see the dust particles floating in the sunlight clearly.
我们可以很清楚地看到阳光下的灰尘颗粒。
