1.
Matters consist of molecules, and molecules of atoms.
物质由分子构成，而分子由原子构成。
2.
a theory in which matter consists of atoms.
物质由原子构成的学说。
3.
Everything is built up of atoms.
万物是由原子构成的。
4.
Cooking-salt consists of atoms of sodium and chlorine.
食盐由钠原子和氯原子构成。
5.
All are built from numberless atoms, the majority of them united into molecules.
所有的都是由不计其数的原子构成，其中大多数原子结合成为分子。
6.
Consisting of or containing only molecules consisting of two kinds of atoms.
二元的由只有两种原子构成的分子组成的
7.
It is the atoms that make up iron, water, oxygen and the like.
正是原子构成了铁、水、氧等类物质。
8.
Everything in the world is built up from atoms.
世界上一切物质都是由原子构成的。
9.
Water is made up of atoms of hydrogen and oxygen.
水是氢和氧的原子构成的。
10.
Every substance, no matter what it is, is made up of atoms .
每种物质，不管它是什么，都由原子构成。
11.
All substances are made up of atoms.
一切物质都是由原子构成的。
12.
Zeolites are made up mainly of a framework of silicon, oxygen, and aluminum.
沸石的骨架主要由硅、氧和铝原子构成。
13.
No matter what substance it may is, it is make up of atom.
不管这是什么物质，都由原子构成。
14.
A molecule of water is made up of two atoms of hygrogen and one atom of oxygen.
一个水分子是由两个氢原子和一个氧原子构成的。
15.
Atoms are made up of electrons and protons.
原子由电子和质子构成。
16.
Atoms are made from a nucleus of protons and neutrons and a cloud of electrons.
原子是由质子和中子组成的原子核与围绕原子核的电子云构成的。
17.
The nucleus of an atom consists of neutrons, protons and other particles.
原子核由中子、质子和其他粒子构成。
18.
Nuclei are composed of protons and neutrons.
原子核是由质子和中子构成的。