ordinary number

• 序数

ordinary number的用法和样例：

例句

1. They have the same atomic number and hence nearly identical chemical behaviour but different atomic masses.
   它们有相同的原子序数，因此化学行为几乎完全一样，但原子量不同。
2. As annotation, an equation of the relation between neutrons and protons in nuclei and its periodical solutions as well as atomic number limit are discussed.
   作为诠释，探讨了原子核内中子与质子的趋势关系方程，以及其周期解和原子序数极限值。