ordinary number的用法和樣例：
例句
- They have the same atomic number and hence nearly identical chemical behaviour but different atomic masses.
它們有相同的原子序數，因此化學行為幾乎完全一樣，但原子量不同。 - 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.
作為詮釋，探討了原子核內中子與質子的趨勢關係方程，以及其周期解和原子序數極限值。
