You can use several design patterns, such as Composite, Iterator, and Chain of Responsibility, to implement compositionvariation between services.
可以使用诸如 Composite、Iterator 和 Chain of Responsibility 等设计模式实现服务之间的组合变化。
2
There are some important achievements in this paper in terms of the following aspects: I. Compositionvariation has impact on calculation of reserves when using pressure drawdown technology.
论文在以下几个方面取得重要研究成果：第一，组分变化对压降法储量计算的影响。
3
Chemical analysis of invertebrate prey reveals remarkable variation in nutrient composition among species; even within species, nutrient composition may vary considerably.