添加一个ORDER SIBLINGS BY子句，该子句只能与分级查询子句组合使用，并且将按预先定义的顺序返回同级查询结果。
Adding an ORDER siblings BY clause which is only allowed in composition with the hierarchical query clause and will return the siblings in the predefined sequence.
建立了管道腐蚀缺陷的多级评价体系，按照从简单到复杂，从保守到精确的顺序对缺陷进行分级评价。
The multilevel assessment system of corrosion defects is erected, which carries grade assessment according to the criterion from simpleness to complexity and from conservation to accusation.
要求基于所分配的分级，按重要性的顺序进行显示。
Requirements appear in order of their importance, based on their assigned ranking.
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