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.

主干：animal research seems wasteful at best and cruel at worst.

状语：to those who are unaware that animal research was needed to produce these

treatments, as well as new treatments and vaccines,介词短语（介词+名词）做状语。

定语从句：who are unaware that animal research was needed to produce these treatments, as well as new treatments and vaccines, 修饰those。

宾语从句：that animal research was needed to produce these treatments, as well as new treatments and vaccines,that引导的宾语从句，做are unaware的宾语。

翻译：对于那些不明白获得这些新的治疗方法和疫苗都必须进行动物实验的人来说，动物实验说得好是浪费，说得不好是残忍

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