弦理論嘅一方面 ， 最簡單嘅方式 係呢個 ： 物質由原子組成 原子由質子 、 中子同電子組成 而佢哋又由誇克組成
One aspect of string theory, in its simplest form, is this: matter is made up of atoms, atoms are made up of protons, neutrons, and electrons, which in turn are made up of quarks