原子是元素最小的结构单位。
人们普遍认为：原子是物质的最小颗粒。比如，可能有铜原子存在，或者氖原子，或者铀原子，或者任何元素的原子存在。
The atom is accepted as the smallest particle of matter. There can be atoms of copper, for example, or of neon or of uranium or of any element.
原子是元素的最小粒子。
电脑屏幕上最小的元素就是像素，正如物体的最小元素是原子一样。
The minimal unit of the screen is the pixel, just like everything is consisted of atoms.
原子是元素的最小粒子，它能单独存在或参与化学反应。
The atom is the smallest particle of an element that can have a separate existence of take part in a chemical reaction.
犹如原子是元素的基本单元粒子同样，份子形成为了化合物的1个最小单元。
As the atom is the unit particle for elements, so the molecule forms an indivisible unit for compounds.
犹如原子是元素的基本单元粒子同样，份子形成为了化合物的1个最小单元。
As the atom is the unit particle for elements, so the molecule forms an indivisible unit for compounds.
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