有时，麻醉动物疼痛也很有意义。

Sometimes, numbing animals' pain makes sense, too.

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因此，研究人员要么被迫在麻醉动物身上研究脑部活性，不然就是利用施打了镇静剂或是行动受限制的动物。

As a result, investigators were also forced to study brain activity while an animal was anesthetized or at least sedated and restrained.

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该机构还提到有约1700只非人类的灵长类动物在一些痛苦的实验中未被使用麻醉剂，还有约900只没有得到食物，水及其他一些必需品。

The organization further mentions that 1,700 non-human primates were denied anesthesia in painful experiments, while 900 were denied access to food, water and other basics.

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