求教,这句话怎样理解?考研英语阅读.
Darwin holds that if observation are to be of any use theymust be tested against some view- a thsis ,model,hypothesis,theory.
are to be of any use
麻烦您翻译一下这句话.
这不是翻译题.答案我看了.就是are to be of any use 不懂