An important and often difficult decision to make is whether an aggregation level actually is an element of a (structural) hierarchy, or whether it simply is a property of an item in the dimension.
一个通常难以做出的重要决策就是一个聚集层是否真正是(结构化)层次结构的一个元素，或它是否仅仅是维度中一项的属性。
The Aggregation property is important for complex types: it has to be set to Composition for attributes of a class type and Shared for attributes of metaclass or stereotype.
聚合属性对于复合属性集非常重要：它必须要为类的属性设置成Composition并且为元类的原型类型设置为 Shared 。
The effect of collagen and chitosan on aggregation property of pulp is studied.
研究了胶原蛋白和壳聚糖对纸浆纤维絮聚性能的影响。
Conclution: The 909 can improve cerebral ischemia and inhibit deep venous thrombosis, and it also could improve property of hemorheology and inhibit platelet aggregation.
结论：909能预防大鼠脑缺血所致脑损伤、抑制静脉血栓形成，并能够改善血液流变性和抑制血小板聚集。
The spray granulation in fluidized beds is suitable to a wide range of particle sizes and shapes, and its products show good flowing property without aggregation.
流化床造粒操作对颗粒的尺寸、形状要求不高，所得到的产品无结块、具有良好的流动性能。
The spray granulation in fluidized beds is suitable to a wide range of particle sizes and shapes, and its products show good flowing property without aggregation.
流化床造粒操作对颗粒的尺寸、形状要求不高，所得到的产品无结块、具有良好的流动性能。
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