Is there any circumstance when animal experimentation or the use of animals in medical education would be warranted?
2
美国加州的科学家已经采用微小的塑料颗粒作为人工抗体使用，并首次进行活体实验。
Scientists in California have used tiny plastic particles as artificial antibodies for the first time in live animals.
3
有些人认为做活体实验很残酷是因为动物应该人类的好朋友，应该有他们生存的权利。
Some believe that it is rather brutal to carry out vivisection experiments because animals are human's good friends and they have the rights to survive.
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