An atom is mostly empty space with almost all its substance concentrated into a tiny kernel called the nucleus, and the electrons can be imagined as flying around the nucleus like a swarm of bees.

• 原子基本上是个一无所有的空间，其中的所有物质几乎全部集中于一个被称为原子核的微小核心中，而电子则可以假想为一群围绕着原子核飞行的蜜蜂。