各种物质，不论它是什么，都是由一些称为分子的很小的粒子构成的。
Every substance, no matter what it is, is composed of very small particles called molecules.
德谟克利特认为物质是由分立的粒子构成的。
Democritus argued that matter is formed from discrete particles.
一切物质都是由大量称作原子的粒子构成的。
All substances are composed of a great many particles called atoms.
应用推荐