In the early nineteenth century, Dalton, an English school teacher, stated in this atomic theory that matter was made up of tiny, indivisible particles, which he also called atoms.

十九世纪初，一位英国教师——道尔顿，在他的原子学说中论述，物质是由极小的、不可分割的粒子组成。他也把这些微粒叫做原子。

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In the early nineteenth century, Dalton, an English school teacher, stated in this atomic theory that matter was made up of tiny, indivisible particles, which he also called atoms.

十九世纪初，一位英国教师——道尔顿，在他的原子学说中论述，物质是由极小的、不可分割的粒子组成。他也把这些微粒叫做原子。

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