When she was a sophomore, though, she took a course in biology. It was there that she discovered the wonder and excitement of scientific study of those animals she had learned to know and admire as a child tramping through the woods.  

【翻译】然而，在她上大二的时候，她学了一门生物课程。就在那里，她发现了对那些动物作科学研究的奇妙和冲动，这些动物是她小时候在树林中漫步时学会认识和欣赏的。

【分析】

1. It was there that she discovered the wonder and excitement of scientific study of those animals she had learned to know and admire as a child tramping through the woods.  

这是一个强调句，漏掉了that。还原后：

There she discovered the wonder and excitement of scientific study of those animals she had learned to know and admire as a child tramping through the woods. 

2. she had learned to know and admire as a child tramping through the woods， 是定语从句，修饰those animals，而those animals是know and admire的宾语。

3. as a child 和tramping through the woods，分别是时间状语，修饰定语从句中的had learned to know and admire。as a child中，as是介词。词组翻译成：“小时候；是个孩子的时候”。