Nor, Mr Phelps has written, does it mean "a pristine element of nature not susceptible to intervention by man."
而意味着“自然的原始成分不容易被人们介入操纵”,菲尔普斯先生这么写道。
2
Although you could model all your data without attributes, they can be a very intuitive choice for data items which are known in advance to never repeat (per element) nor have any sub-fields.