While other elements within a channel may stay constant, items are likely to change frequently.
频道中的其他元素可能不变，但项经常发生变化。
Each channel element contains a number of item elements.
各个channel元素包含多个item元素。
The channel form is manipulated by an invisible hand-the combination mechanism of the basic elements.
分销通路的形态如何并不能随心所欲，其间有一只看不见的手在操纵，即基本要素的组合机制。
The channel form is manipulated by an invisible hand-the combination mechanism of the basic elements.
分销通路的形态如何并不能随心所欲，其间有一只看不见的手在操纵，即基本要素的组合机制。
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