由于这一级别低于地面，但它并没有显示在面对建设。
Since this level was below ground, it did not show on the face of the building.
“称谓”是人们由于亲属和别方面的相互关系，以及由于身份、职业等等而得来的名称。
Appellation is due to the mutual relations between relatives and other aspects, as well as status, occupation and so on.
这种情况是由于金属生产和选别式地下开采的特点而引起的。
This is determined by the characters of metal production procedure as well as selective mining method itself.
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