导读：2016考研在于每天坚持的努力，每天坚持一点，就能取得不错的收获!文都网校分享《考研英语每日一练》。　　　 

      To those who are unaware that animal research was needed to produce these treatments，as well as new treatments and vaccines，animal research seems wasteful at best and cruel at worst.To those who are unaware that animal research was needed to produce these treatments,as well as new treatments and vaccines ( 是介词短语作状语)介词短语中又包含一个who引导的定语从句修饰those.who are unaware that animal research was needed to produce these treatments,as well as new treatments and vaccines 是一个定语从句,在这个定语从句中又含有一个宾语从句 that animal research was needed to produce these treatments,as well as new treatments and vaccines 宾语从句.下面才是句子的主干 animals research (主语)seems (系动词)wasteful at best and cruel at worst ( 表语).参考翻译：有些人不了解生产这些治疗手段以及新的一些治疗手段和疫苗是需要动物研究的。对于他们而言，动物研究说的好听是浪费，说的难听是残忍。

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