Besides electrons, an atom contains protons and neutrons.
除了电子，原子还含有质子和中子。
Besides investigating the properties of electrons, we also try to design and tune the electronic states to make them practical, which is an important but also challenging issue.
除了理解电子态的各种奇异性质，如何适当的调控，使之成为实用的功能材料是十分重要也是十分困难的问题。
Today, besides the electrons, protons and neutrons, many more particles have been discovered.
今天除了电子、质子和中子外，还发现了更多的粒子。
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