Furthermore, humans have the ability to modify the environment in which they live, thus subjecting all other life forms to their own peculiar ideas and fancies.
98 年71) But even more important, it was the farthest that scientists had been able to look into the past, for what they were seeing were the patterns and structures that existed 15 billion years ago.
这个句子中That existed 15 billion years ago.是一个定语从句，其先行词是the patterns and structures.这个定语从句比较简单，我们可以直接将其翻译他所修饰的先行词的前面。
03年64) Tylor defined culture as "... that complex whole which includes belief, art, morals, law, custom, and any other capabilities and habits acquired by man as a member of society."
2004年61题：The Greeks assumed that the structure of language had some connection with the process of thought, which took root in Europe long before people realized how diverse languages could be.（非限定性定语从句）
“which took root in Europe long before people realized how diverse languages could be.”是非限定性定语从句，修饰前面整个句子；在定语从句中long before 引导时间状语从句修饰动词短语Take Root，在状语从句中又包含了一个由how 引导的宾语从句，作realized的宾语。句中Take root in 作“ 扎根“讲。因此这个非限定性定语从句是较为复杂的，所以我们采用单独成句的翻译方法。