In surveying potential candidates for "new Earths," astronomers look for traces of biological activity, such as the presence of oxygen.

在可能成为“新地球”的调查对象中，天文学家搜寻生物活动的迹象，例如检查是不是有氧气。

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Commander Dylan Schmorrow, a cognitive scientist with the navy, devised a crown of sensors to monitor activity in the brain such as blood flow and oxygen levels.

海军中校迪伦·斯莫罗是一位认知科学家，他设计出一种传感器人造冠，用来监测大脑的一些活动，如血流量和氧含量。

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The electrical activity excites the brain and increases oxygen - and glucose-rich blood flow to the cerebral cortex, the area of the brain that controls cognitive function, personality and emotion.

电子活动激发大脑，并增加氧和葡萄糖丰富的血液流向大脑皮质——大脑的控制认知功能，个性和情绪的领域。

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To study the neurology of tickling, Dr Blakemore and her team stuck volunteers into a magnetic-resonance-imaging machine (which monitors oxygen flow to the brain, and thus indicates the amount of activity in that organ's various parts).

ECONOMIST: Neuroscience: Tickled curiosity | The

By contrast, modest black-hole activity can stir things up and encourage the formation of the kinds of elements (carbon, oxygen and so on) that are essential for life as we know it.

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