It has long been considered that because tin is a characteristicelement of the crust, there should be direct relation between tin ore deposit and granite.
长期以来，人们一直认为锡是地壳的特征元素，锡矿床的形成通常与花岗岩有直接的关系。
2
They have the same number of protons in their nuclei (this is the defining characteristic of an element), but different Numbers of neutrons.
在它们的原子核中质子数是相同的(这是一个元素定义性的特征)，但是中子的数量不同。
3
The code using characteristic values can be applied to a specific document element, and the style created in this way is .