With PET scans and functional MRI, we can observe fluctuations in brain activity by measuring changes in blood flow and levels of nutrients.
有了PET扫描与MRI(核磁共振成像)，我们可以观察到大脑活动的波动，通过测量血液流动与营养物等级的变化。
A pet may help lower blood pressure and heart rate, for example, or ease stress, loneliness and even dementia-related agitation in the elderly.
比如，养宠物有助于降低血压和心率，能够缓解压力、减轻孤独感、甚至可以缓解老年痴呆症所引起的焦虑。
The team also took blood samples from wild born, pet animals in Gabon.
该小组还在加蓬采集了野生宠物的血液样本。
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