聚合是一种特别类型的关联，用于描述“总体到局部”的关系。
Aggregation is a special type of association used to model a "whole to its parts" relationship.
块状榴辉岩中石榴石的位错密度低，没有观察到水分子团，虽然在局部发现有位错网，但总体上仍呈刚性。
In the massive eclogites, the garnets with low dislocation density and with no visible clusters of water molecules are mainly rigid although a few dislocation nets have been observed.
本文的研究总体上依照从整体到局部的思路。
The study adheres to the way of thinking from whole to part.
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