每个硫酸铜单位晶格所含有的铜、硫、氧这三种元素的原子数的比例和每个硫酸铜分子中这三种元素的原子数的比例，二者是相一致的。
There is in the structure a unit of pattern containing copper, sulphur, and oxygen atoms in the same proportions as that in which they occur in the molecule.
和该化合物中每个分子所含每种元素的原子量的数目。
The chemical formula also shows the number of atoms of each element in one molecule of a compound.
血红蛋白里的铁元素会和发光氨里的化学发生反应。意思就是说它里面的原子会重组并形成新的分子。
The iron in hemoglobin causes the chemicals in luminol to react, meaning that their atoms rearrange to form new molecules.
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