Fermions are particles with half integer spins and Bosons with integer spins. So Fermions of even number can form a Boson. Due to the Pauli Exclusion Law, there are no identical Fermions, therefore, different Fermions can form a Boson.

The elementary Bosons are a little different. They carry forces and do not follow the Pauli Exclusion Principle.
【 在 Victorialu 的大作中提到: 】
: 不一样的费米子可以什么？举例来说？
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