求翻译一个句子~

jeffery2541

句子如下：
In her 26 years in the forests of Gombe, Jane Goodall collected data that proved that chimpanzees exhibit the kind of curiosity by which new patterns of behavior and expression can be passed on from one to another by imitation and practice.
关键是句子后半部分（从by which开始）的意思不是很明白~

jeffery2541

顶一下啦~

wyw1018

这样调整一下句子就清楚了In her 26 years in the forests of Gombe, Jane Goodall collected data that proved that chimpanzees exhibit the kind of curiosity and New patterns of behavior and expression can be passed on from one to another by the kind of curiosity by imitation and practice.
by which 修饰被动语态be passed on作为动作的发出者，by imitation and practice修饰chimpanzees 通过什么样的方式完成前述动作。

wyw1018

还原成主动语态
In her 26 years in the forests of Gombe, Jane Goodall collected data that proved that chimpanzees exhibit the kind of curiosity that can pass on new patterns of behavior and expression from one to another by imitation and practice.

wyw1018

又想了想，觉得by which 是修饰new patterns of behavior and expression from one to another 使用的方式， by imitation and practice是 chimpanzees使用的方式。

jeffery2541

又想了想，觉得by which 是修饰new patterns of behavior and expression from one to another 使用的方式， by imitation and practice是 chimpanzees使用的方式。

-- by 会员 wyw1018 (2012/9/29 4:11:09)

谢谢你的讲解。可是我还是不太明白，这个句子为什么要这么表达呢？
by which的从句中只有一个谓语，但却有两个by的方式状语，怎么说呢？
或者说其中一个by短语不是方式状语？