A team of physicists in the us has created an infrared laser beam at a point in mid air, by focusing a UV laser onto a tiny volume of oxygen molecules.

美国的一个物理学家团队通过将一束紫外激光聚焦于一小块氧分子中，发明了一种聚焦于半空中一点的红外激光束。

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Dr He's team experimented with different shapes and found a simple one-step method using polystyrene spheres treated with oxygen and then coated with silica to build raspberry-like shapes.

贺博士的团队针对不同的形状的纳米颗粒做了实验，发现一个简单的一步到位的方法：采用聚苯乙烯微球，先经氧气处理，然后再涂上硅石，便会形成树莓形状的颗粒。

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Gupta, one of a team of 46 medical staff who delivered the octuplets, said: "Only three babies need some sort of oxygen through the nose right now but they are breathing on their own."

古普塔是接生这八胞胎的46人团队中的一员，他说：“目前只有三个孩子需要通过鼻子输送一些氧气，但他们都在主动呼吸。”

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Earlier in 2007, Brazilian club Flamengo said they would not play again at altitude after several of their players needed oxygen during a game against Bolivian team Real Potosi, held at nearly 4, 000m (13, 120ft).

BBC: Fifa bans high-altitude football

Ben Yehuda asked a passing British climbing team to help him, to give the man oxygen.

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The medical team started Sara on intravenous antibiotics and high-flow oxygen through a mask.

NEWYORKER: Letting Go