因为他们都不够简洁。

They're not simple enough.

youdao

纵观现今诸多消费者购买行为模式，要么太抽象；要么太繁琐，不够简洁明了；要么不完整。

There are many model of the customers' purchasing behavior which are either too abstract and incomplete or too complicated to understand.

youdao

纵观现今诸多消费者购买行为模式 ，要么太抽象 ； 要么太繁琐 ，不够简洁明了 ； 要么不完整。

There are many model of the customers purchasing behavior which are either too abstract and incomplete or too complicated to understand.

youdao