"The key is to use oxygen in the air as a re-agent, rather than carry the necessary chemicals around inside the battery," says Bruce.

“关键就在于使用空气中的氧气作为试剂，而不是在电池内部添装必需的化学成分。”布鲁斯说。

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Carbon monoxide would reduce the ability of red blood cells carry oxygen around the body.

一氧化碳能减低红血球将氧输送到全身的能力。

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Red cells carry oxygen around the body. When the number of red cells is below normal this is called anemia.

红细胞会把氧气带到全身，红细胞的数量低于正常水平即所谓的贫血。

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These are the cells which carry oxygen around the body to keep tissues alive - a child with severe thalassaemia will become anaemic, fail to thrive, and, if left without treatment, can die in childhood.

BBC: Q&A: Test-tube lifesaver